Gravesande, Willem Jacob 's, Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1

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            <s xml:id="echoid-s13922" xml:space="preserve">
              <pb o="(47)" file="0545" n="600" rhead="MATHEMATICA LIB. III. CAP. X."/>
            liquet, quod ligamina ciliaria muſculoſa ſint: </s>
            <s xml:id="echoid-s13923" xml:space="preserve">quando hi mu-
              <lb/>
            ſculi inflantur, & </s>
            <s xml:id="echoid-s13924" xml:space="preserve">breviores fiunt, minuitur cavitas quæ exin-
              <lb/>
            flexione horum ligaminum formatur in C l, C l; </s>
            <s xml:id="echoid-s13925" xml:space="preserve">quo com-
              <lb/>
            primitur humor vitreus, qui ipſe in humorem cryſtallinum
              <lb/>
            premit & </s>
            <s xml:id="echoid-s13926" xml:space="preserve">hunc propellit, hujuſque diſtantiam à retinâ auget;
              <lb/>
            </s>
            <s xml:id="echoid-s13927" xml:space="preserve">quod in viſione objectorum propinquorum requiritur .</s>
            <s xml:id="echoid-s13928" xml:space="preserve"/>
          </p>
          <note symbol="*" position="right" xml:space="preserve">663. 699.</note>
          <p>
            <s xml:id="echoid-s13929" xml:space="preserve">Aliam præter hanc in oculo mutationem dari, ex experi-
              <lb/>
            mento, in ſequentibus memorando , demonſtratum
              <note symbol="*" position="right" xlink:label="note-0545-02" xlink:href="note-0545-02a" xml:space="preserve">753.</note>
            quæ cum hac contrariè agit; </s>
            <s xml:id="echoid-s13930" xml:space="preserve">quod unde deductum fuerit
              <lb/>
            dicetur. </s>
            <s xml:id="echoid-s13931" xml:space="preserve">Mutatio autem ſecunda etiam ad ipſum cryſtalli-
              <lb/>
            num referenda eſt; </s>
            <s xml:id="echoid-s13932" xml:space="preserve">hic quando à ligaminibus ciliaribus tra-
              <lb/>
              <note position="right" xlink:label="note-0545-03" xlink:href="note-0545-03a" xml:space="preserve">722.</note>
            hitur, quo à fundo oculi recedit, etiam planior fit, quare
              <lb/>
            ut magis recedat, quàm ſi figuram immutabilem baberet, ne-
              <lb/>
              <note position="right" xlink:label="note-0545-04" xlink:href="note-0545-04a" xml:space="preserve">723.</note>
            ceſſe eſt: </s>
            <s xml:id="echoid-s13933" xml:space="preserve">id eſt, mutationem magis ſenſibilem eſſe, quod
              <lb/>
            uſum ſuum habere videbimus .</s>
            <s xml:id="echoid-s13934" xml:space="preserve"/>
          </p>
          <note symbol="*" position="right" xml:space="preserve">730.</note>
          <p>
            <s xml:id="echoid-s13935" xml:space="preserve">Limites ſuos habent hæ mutationes in oculo, inde etiam
              <lb/>
            objecta tantum diſtincta apparent inter certos limites, ad
              <lb/>
              <note position="right" xlink:label="note-0545-06" xlink:href="note-0545-06a" xml:space="preserve">724.</note>
            varias diſtantias pro variis oculis poſitos; </s>
            <s xml:id="echoid-s13936" xml:space="preserve">& </s>
            <s xml:id="echoid-s13937" xml:space="preserve">ſæpiſſimè in
              <lb/>
              <note position="right" xlink:label="note-0545-07" xlink:href="note-0545-07a" xml:space="preserve">725.</note>
            eodem bomine, non pro ſingulis oculis iidem limites dan-
              <lb/>
            tur, quod ejuſdem ferè eſt utilitatis, ac ſi pro ambobus
              <lb/>
            oculis limites magis inte ſe diſtarent; </s>
            <s xml:id="echoid-s13938" xml:space="preserve">unico enim oculo ob-
              <lb/>
            jectum diſtinctè videri ſat eſt. </s>
            <s xml:id="echoid-s13939" xml:space="preserve">In quibuſdam etiam, proxi-
              <lb/>
            mus limes reſpectu unius oculi, magis diſtat quàm maximè
              <lb/>
            remotus reſpectu alterius, in hoc caſu objecta propinqua & </s>
            <s xml:id="echoid-s13940" xml:space="preserve">
              <lb/>
            valdè remota diſtinctè videntur, intermedia confuſa apparent.</s>
            <s xml:id="echoid-s13941" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s13942" xml:space="preserve">Pictura in fundo oculi, ut dictum , eſt inverſa; </s>
            <s xml:id="echoid-s13943" xml:space="preserve">
              <note position="right" xlink:label="note-0545-08" xlink:href="note-0545-08a" xml:space="preserve">726.</note>
            quæſitum, quare objecta erecta appareant? </s>
            <s xml:id="echoid-s13944" xml:space="preserve">Quæſtione re-
              <lb/>
              <note symbol="*" position="right" xlink:label="note-0545-09" xlink:href="note-0545-09a" xml:space="preserve">714.</note>
            ſpondemus, an quis melius concipiat nexum inter ideam in
              <lb/>
            mente, & </s>
            <s xml:id="echoid-s13945" xml:space="preserve">figuram erectam, quàm everſam? </s>
            <s xml:id="echoid-s13946" xml:space="preserve">nexum in neu-
              <lb/>
            tro caſu nos nullum percipere fatemur: </s>
            <s xml:id="echoid-s13947" xml:space="preserve">Experientia autem
              <lb/>
            docet, dari nexum inter picturam inverſam in oculo & </s>
            <s xml:id="echoid-s13948" xml:space="preserve">ob-
              <lb/>
            jecti erecti ideam; </s>
            <s xml:id="echoid-s13949" xml:space="preserve">& </s>
            <s xml:id="echoid-s13950" xml:space="preserve">præterea nihil novimus.</s>
            <s xml:id="echoid-s13951" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s13952" xml:space="preserve">Ambobus oculis ſi idem objectum intueamur unicum appa-
              <lb/>
              <note position="right" xlink:label="note-0545-10" xlink:href="note-0545-10a" xml:space="preserve">727.</note>
            ret; </s>
            <s xml:id="echoid-s13953" xml:space="preserve">illudque in eo caſu ſolo, quando objectum in punctis re-
              <lb/>
            ſpondentibus retinæ depingitur; </s>
            <s xml:id="echoid-s13954" xml:space="preserve">quod probabiliter ex con-
              <lb/>
            curſu nervorum opticorum ſequitur. </s>
            <s xml:id="echoid-s13955" xml:space="preserve">Obſervatur enim in
              <lb/>
            omnibus animalibus, quæ idem objectum ambobus </s>
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