Barrow, Isaac, Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur

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            <s xml:id="echoid-s5047" xml:space="preserve">
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            Rρ :</s>
            <s xml:id="echoid-s5048" xml:space="preserve">: CF. </s>
            <s xml:id="echoid-s5049" xml:space="preserve">Fβ quapropter erit ex æquo Xξ. </s>
            <s xml:id="echoid-s5050" xml:space="preserve">Rρ :</s>
            <s xml:id="echoid-s5051" xml:space="preserve">: Fγ. </s>
            <s xml:id="echoid-s5052" xml:space="preserve">Fβ.
              <lb/>
            </s>
            <s xml:id="echoid-s5053" xml:space="preserve">non diſpare ratione conſtabit eſſe Rρ. </s>
            <s xml:id="echoid-s5054" xml:space="preserve">Nv:</s>
            <s xml:id="echoid-s5055" xml:space="preserve">: Fβ. </s>
            <s xml:id="echoid-s5056" xml:space="preserve">Fα. </s>
            <s xml:id="echoid-s5057" xml:space="preserve">ergò cùm
              <lb/>
            tres Xξ, Rρ, NV ſe æqualiter excedant; </s>
            <s xml:id="echoid-s5058" xml:space="preserve">etiam tres Fγ, Fβ, Fα
              <note symbol="*" position="right" xlink:label="note-0097-01" xlink:href="note-0097-01a" xml:space="preserve">_21 hujus Lect._
                <lb/>
              _Hy
                <unsure/>
              p._</note>
            æqualiter excedent; </s>
            <s xml:id="echoid-s5059" xml:space="preserve">unde conſequetur eſſe Cα-Cβ&</s>
            <s xml:id="echoid-s5060" xml:space="preserve">lt;</s>
            <s xml:id="echoid-s5061" xml:space="preserve">Cβ-Cγ;
              <lb/>
            </s>
            <s xml:id="echoid-s5062" xml:space="preserve">nec non eſſe α G-β H&</s>
            <s xml:id="echoid-s5063" xml:space="preserve">lt;</s>
            <s xml:id="echoid-s5064" xml:space="preserve">βH-γI; </s>
            <s xml:id="echoid-s5065" xml:space="preserve">adeóque conjunctim
              <note symbol="*" position="right" xlink:label="note-0097-02" xlink:href="note-0097-02a" xml:space="preserve">_22 buius Lect_</note>
            - CH &</s>
            <s xml:id="echoid-s5066" xml:space="preserve">lt; </s>
            <s xml:id="echoid-s5067" xml:space="preserve">CH - CI; </s>
            <s xml:id="echoid-s5068" xml:space="preserve">hoc eſt CK-CL &</s>
            <s xml:id="echoid-s5069" xml:space="preserve">lt; </s>
            <s xml:id="echoid-s5070" xml:space="preserve">CL - CO; </s>
            <s xml:id="echoid-s5071" xml:space="preserve">hoc
              <lb/>
            eſt denuò LK &</s>
            <s xml:id="echoid-s5072" xml:space="preserve">lt; </s>
            <s xml:id="echoid-s5073" xml:space="preserve">OL: </s>
            <s xml:id="echoid-s5074" xml:space="preserve">Q. </s>
            <s xml:id="echoid-s5075" xml:space="preserve">E. </s>
            <s xml:id="echoid-s5076" xml:space="preserve">D.</s>
            <s xml:id="echoid-s5077" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5078" xml:space="preserve">XV. </s>
            <s xml:id="echoid-s5079" xml:space="preserve">Hinc apparet rectiùs illapſam refringenti lucem magìs inſpiſſa-
              <lb/>
            ri; </s>
            <s xml:id="echoid-s5080" xml:space="preserve">versúſque punctum Z in arctius redigi; </s>
            <s xml:id="echoid-s5081" xml:space="preserve">maximam proinde vim
              <lb/>
            ejus iſthic exeri; </s>
            <s xml:id="echoid-s5082" xml:space="preserve">focúmque combuſtionis (ad ſolem) ibi verſari.</s>
            <s xml:id="echoid-s5083" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5084" xml:space="preserve">XVI. </s>
            <s xml:id="echoid-s5085" xml:space="preserve">Conſectatur etiam radios (hujuſmodi ſaltem parallelos) quò
              <lb/>
            rectiores oculo (cujus nempe ſuperficies refractionis munus obeuntes
              <lb/>
            aut Sphæricæ ſunt, aut Sphæricas aliquatenus referunt) incidunt, eò
              <lb/>
            facilius ab ipſo readunari, ſeu propiùs recolligi.</s>
            <s xml:id="echoid-s5086" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5087" xml:space="preserve">XVII. </s>
            <s xml:id="echoid-s5088" xml:space="preserve">Quinimò tandem ex his colligitur viſibilis longinqui puncti
              <lb/>
            ſpeciem oculo, in axe poſito, circa punctum Z apparere. </s>
            <s xml:id="echoid-s5089" xml:space="preserve">Etenim ab
              <lb/>
            ei adjacentibus partibus refracti cùm præ cæteris perpendiculares (vi
              <lb/>
            proinde fortiores, & </s>
            <s xml:id="echoid-s5090" xml:space="preserve">recollectu paratiores) neque non copioſiores
              <lb/>
            affluunt; </s>
            <s xml:id="echoid-s5091" xml:space="preserve">quibus ex cauſis imaginis poſitio dependet; </s>
            <s xml:id="echoid-s5092" xml:space="preserve">ut jam ſæpiùs
              <lb/>
            admonitum: </s>
            <s xml:id="echoid-s5093" xml:space="preserve">- ἐχ{θρ}όν δέ {μο}ι {ἐστι}ὶν Αὖ
              <unsure/>
            πς ἀeιζήλως {ηῤ}ρημένα μυ{θσ}λο {γρ}ύ{ει}ν
              <lb/>
            cæterùm hâc defunctus curâ tantiſper reſpirabo.</s>
            <s xml:id="echoid-s5094" xml:space="preserve">‖</s>
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