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

Table of figures

< >
[Figure 71]
[Figure 72]
[Figure 73]
[Figure 74]
[Figure 75]
[Figure 76]
[Figure 77]
[Figure 78]
[Figure 79]
[Figure 80]
[Figure 81]
[Figure 82]
[Figure 83]
[Figure 84]
[Figure 85]
[Figure 86]
[Figure 87]
[Figure 88]
[Figure 89]
[Figure 90]
[Figure 91]
[Figure 92]
[Figure 93]
[Figure 94]
[Figure 95]
[Figure 96]
[Figure 97]
[Figure 98]
[Figure 99]
[Figure 100]
< >
page |< < (56) of 430 > >|
    <echo version="1.0RC">
      <text xml:lang="fr" type="free">
        <div xml:id="echoid-div29" type="section" level="1" n="12">
          <p>
            <s xml:id="echoid-s738" xml:space="preserve">
              <pb o="56" file="0072" n="72" rhead="DE LA PHIL OSOPHIE"/>
            die contraire, il eſt trop rond: </s>
            <s xml:id="echoid-s739" xml:space="preserve">les rayons ſe
              <lb/>
            réuniſſent trop tôt, comme vous le voyez
              <lb/>
            au point B. </s>
            <s xml:id="echoid-s740" xml:space="preserve">ils ſe croiſent trop vîte, ils ſe
              <lb/>
            ſéparent en B. </s>
            <s xml:id="echoid-s741" xml:space="preserve">& </s>
            <s xml:id="echoid-s742" xml:space="preserve">vont faire une tache ſur
              <lb/>
            la rétine. </s>
            <s xml:id="echoid-s743" xml:space="preserve">C’eſt-là ce qu’on appelle un œil
              <lb/>
              <note position="left" xlink:label="note-0072-01" xlink:href="note-0072-01a" xml:space="preserve">Oeil
                <lb/>
              myope.</note>
            myope. </s>
            <s xml:id="echoid-s744" xml:space="preserve">Cet inconvénient diminue à me-
              <lb/>
            ſure que l’âge en amene d’autres, qui ſont
              <lb/>
            la ſéchereſſe & </s>
            <s xml:id="echoid-s745" xml:space="preserve">la faibleſſe: </s>
            <s xml:id="echoid-s746" xml:space="preserve">elles aplatiſ-
              <lb/>
            ſent inſenſiblement cet œil trop rond; </s>
            <s xml:id="echoid-s747" xml:space="preserve">& </s>
            <s xml:id="echoid-s748" xml:space="preserve">
              <lb/>
            voilà pourquoi on dit que les vûes courtes
              <lb/>
            durent plus long-tems. </s>
            <s xml:id="echoid-s749" xml:space="preserve">Ce n’eſt pas qu’en
              <lb/>
            effet elles durent plus que les autres, mais
              <lb/>
            c’eſt qu’à un certain âge, l’œil deſſeché s’a-
              <lb/>
            platit: </s>
            <s xml:id="echoid-s750" xml:space="preserve">alors celui qui étoit obligé aupara-
              <lb/>
            vant d’approcher ſon Livre à trois ou qua-
              <lb/>
            tre pouces de ſon œil, peut lire quelquefois
              <lb/>
            à un pied de diſtance: </s>
            <s xml:id="echoid-s751" xml:space="preserve">mais auſſi ſa vûe de-
              <lb/>
            vient bien-tôt trouble & </s>
            <s xml:id="echoid-s752" xml:space="preserve">confuſe, il ne
              <lb/>
            peut voir les objets éloignés; </s>
            <s xml:id="echoid-s753" xml:space="preserve">telle eſt no-
              <lb/>
            tre condition, qu’un défaut ne ſe répare
              <lb/>
            presque jamais que par un autre.</s>
            <s xml:id="echoid-s754" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s755" xml:space="preserve">Or, tandis que cet œil eſt trop rond, il lui
              <lb/>
            faut un Verre qui empêche les rayons de ſe
              <lb/>
            réunir ſi vîte. </s>
            <s xml:id="echoid-s756" xml:space="preserve">Ce Verre fera le contraire du
              <lb/>
            premier, au lieu d’être convexe des deux cô-
              <lb/>
            tés, il ſera un peu concave des deux </s>
          </p>
        </div>
      </text>
    </echo>