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

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              <pb o="53" file="0065" n="65" rhead="DE NEUTON."/>
            B. </s>
            <s xml:id="echoid-s687" xml:space="preserve">A. </s>
            <s xml:id="echoid-s688" xml:space="preserve">C. </s>
            <s xml:id="echoid-s689" xml:space="preserve">ſe détournent dans l’épaiſſeur du
              <lb/>
            Verre en s’approchant des perpendiculai-
              <lb/>
            res, qu’on tireroit ſur les endroits où ils tom-
              <lb/>
            bent. </s>
            <s xml:id="echoid-s690" xml:space="preserve">Enſuite quand ils ſortent du Verre
              <lb/>
            pour paſſer dans l’air, ils ſe briſent encore en
              <lb/>
            s’éloignant du perpendicule; </s>
            <s xml:id="echoid-s691" xml:space="preserve">ce nouveau
              <lb/>
            briſement eſt préciſément ce qui les fait
              <lb/>
            converger en D. </s>
            <s xml:id="echoid-s692" xml:space="preserve">foyer du Verre lenticu-
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            laire.</s>
            <s xml:id="echoid-s693" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s694" xml:space="preserve">Or la rétine, cette membrane legére, cet-
              <lb/>
            te expanſion du nerf optique, qui tapiſſe
              <lb/>
            le fond de notre œil, eſt le foyer du criſtal-
              <lb/>
            lin: </s>
            <s xml:id="echoid-s695" xml:space="preserve">c’eſt à cette rétine que les rayons abou-
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            tiſſent: </s>
            <s xml:id="echoid-s696" xml:space="preserve">mais avant d’y parvenir, ils ren-
              <lb/>
            contrent encore un nouveau milieu qu’ils
              <lb/>
            traverſent; </s>
            <s xml:id="echoid-s697" xml:space="preserve">ce nouveau milieu eſt l’humeur
              <lb/>
            vitrée, moins ſolide que le criſtallin, moins
              <lb/>
            fluide que l’humeur aqueuſe.</s>
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            <s xml:id="echoid-s699" xml:space="preserve">C’eſt dans cette humeur vitrée que les
              <lb/>
            rayons ont le tems de s’aſſembler, avant de
              <lb/>
            venir faire leur derniere réunion ſur les
              <lb/>
            points du fond de notre œil. </s>
            <s xml:id="echoid-s700" xml:space="preserve">Figurez-vous
              <lb/>
            donc ſous cette lentille du criſtallin, cette
              <lb/>
            humeur vitrée ſur laquelle le criſtallin s’ap-
              <lb/>
            puye; </s>
            <s xml:id="echoid-s701" xml:space="preserve">cette humeur tient le criſtallin </s>
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