Ibn-al-Haitam, al-Hasan Ibn-al-Hasan; Witelo; Risner, Friedrich, Opticae thesavrvs Alhazeni Arabis libri septem, nunc primùm editi. Eivsdem liber De Crepvscvlis & Nubium ascensionibus. Item Vitellonis Thuvringopoloni Libri X. Omnes instaurati, figuris illustrati & aucti, adiectis etiam in Alhazenum commentarijs, a Federico Risnero, 1572

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          <p>
            <s xml:id="echoid-s1542" xml:space="preserve">
              <pb o="26" file="0032" n="32" rhead="ALHAZEN"/>
            iuuant ad ordinationem formarum rerum uiſibilium, niſi apud glacialem tantùm:</s>
            <s xml:id="echoid-s1543" xml:space="preserve"> quoniam apud
              <lb/>
            membrum iſtud principium eſt ſenſus.</s>
            <s xml:id="echoid-s1544" xml:space="preserve"> Et declaratum eſt in primo tractatu etiam [15.</s>
            <s xml:id="echoid-s1545" xml:space="preserve">16.</s>
            <s xml:id="echoid-s1546" xml:space="preserve">18 n] quod
              <lb/>
            impoſsibile eſt, ut forma rei uiſæ ſit ordinata in ſuperficie uiſus cũ imagine rei uiſæ & paruitate rei
              <lb/>
            ſentientis, niſi per iſtas lineas.</s>
            <s xml:id="echoid-s1547" xml:space="preserve"> Iſtæ ergo lineæ non ſunt, niſi inſtrumentũ uiſus, per quas completur
              <lb/>
            comprehenſio rerum uiſarum ſecundum ſuum eſſe.</s>
            <s xml:id="echoid-s1548" xml:space="preserve"> Peruentus autem formarum ad ultimum ſen-
              <lb/>
            tiens, non indiget extenſione ſecundum rectitudinem iſtarum linearum.</s>
            <s xml:id="echoid-s1549" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div57" type="section" level="0" n="0">
          <head xml:id="echoid-head81" xml:space="preserve" style="it">4. Humor cryſtallin{us} lucem & colorem aliter recipit, quàm cæter a perſpicua corpora.
            <lb/>
          22 p 3. Idem 30 n 1.</head>
          <p>
            <s xml:id="echoid-s1550" xml:space="preserve">ET receptio formarum in membro ſentiente non eſt, ſicut receptio formarum in corporibus
              <lb/>
            diaphanis:</s>
            <s xml:id="echoid-s1551" xml:space="preserve"> quoniam membrũ ſentiens recipit iſtas formas, & ſentit eas, & pertranſeunt in eo
              <lb/>
            propter ſuam diaphanitatem & uirtutem ſenſibilem, quæ eſt in eo.</s>
            <s xml:id="echoid-s1552" xml:space="preserve"> Recipit ergo iſtas formas
              <lb/>
            ſecundum receptionem ſenſus.</s>
            <s xml:id="echoid-s1553" xml:space="preserve"> Corpora autem diaphana non recipiunt iſtas formas, niſi receptio-
              <lb/>
            ne, qua recipiunt ad reddendum, & non ſentiunt ipſas.</s>
            <s xml:id="echoid-s1554" xml:space="preserve"> Et cum receptio corporis ſentientis ab iſtis
              <lb/>
            formis non ſit ſicut receptio corporum diaphanorum, non ſentientium:</s>
            <s xml:id="echoid-s1555" xml:space="preserve"> extenſio formarum in cor-
              <lb/>
            pore ſentiente non debet eſſe ſecundum uerticationes, quas corpora diaphana exigũt.</s>
            <s xml:id="echoid-s1556" xml:space="preserve"> Viſus ergo
              <lb/>
            non eſt appropriatus receptioni formarum ex uerticationibus linearũ radialium tantùm:</s>
            <s xml:id="echoid-s1557" xml:space="preserve"> niſi quia
              <lb/>
            proprietas formarũ eſt, ut extendãtur in corporibus diaphanis ſuper omnes uerticationes rectas.</s>
            <s xml:id="echoid-s1558" xml:space="preserve">
              <lb/>
            Et cum iſtæ formæ peruenerint ad membrum ſentiens ordinatæ, & comprehendantur à membro
              <lb/>
            ſentiente ordinatæ:</s>
            <s xml:id="echoid-s1559" xml:space="preserve"> nihil remanebit pòſt, indigẽs iſtarum uerticationibus.</s>
            <s xml:id="echoid-s1560" xml:space="preserve"> Pars ergo anterior tan-
              <lb/>
            tùm glacialis eſt appropriata receptioni formarum ex uerticationibus linearum radialium:</s>
            <s xml:id="echoid-s1561" xml:space="preserve"> poſte-
              <lb/>
            rior autẽ pars, quæ eſt humor uitreus:</s>
            <s xml:id="echoid-s1562" xml:space="preserve"> & uirtus recipiens, quæ eſt in illo corpore, nõ eſt appropriata
              <lb/>
            cum ſuo ſenſu iſtarum formarum, niſi ad cuſtodiendum eorum ordinationem tantùm.</s>
            <s xml:id="echoid-s1563" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div58" type="section" level="0" n="0">
          <head xml:id="echoid-head82" xml:space="preserve" style="it">5. Cryſtallin{us} & uitre{us} humores dißimiliter lucem & colorem recipiunt. 22 p 3.</head>
          <p>
            <s xml:id="echoid-s1564" xml:space="preserve">ET cũ ita ſit, qualitas ergo receptionis uitrei à formis non eſt ſicut receptio corporis ſiue qua-
              <lb/>
            litas corporis anterioris glacialis:</s>
            <s xml:id="echoid-s1565" xml:space="preserve"> & uirtus recipiens, quæ eſt in uitreo, nõ eſt uirtus recipiẽs,
              <lb/>
            quæ eſt in parte anteriori.</s>
            <s xml:id="echoid-s1566" xml:space="preserve"> Et cum qualitas receptionis uitrei à formis, non ſit qualitas partis
              <lb/>
            anterioris glacialis:</s>
            <s xml:id="echoid-s1567" xml:space="preserve"> refractio ergo formarum apud ſuperficiem uitrei, non eſt niſi propter diuerſi-
              <lb/>
            tatem qualitatis receptionis ſenſus inter iſta duo corpora.</s>
            <s xml:id="echoid-s1568" xml:space="preserve"> Formæ ergo refringuntur apud uitreum
              <lb/>
            duabus de cauſsis:</s>
            <s xml:id="echoid-s1569" xml:space="preserve"> quarum altera eſt diuerſitas diaphanitatis duorum corporum:</s>
            <s xml:id="echoid-s1570" xml:space="preserve"> & altera diuerſi-
              <lb/>
            tas qualitatis receptionis ſenſus inter iſta duo corpora.</s>
            <s xml:id="echoid-s1571" xml:space="preserve"> Et ſi diaphanitas iſta duorum corporum eſ-
              <lb/>
            ſet conſimilis:</s>
            <s xml:id="echoid-s1572" xml:space="preserve"> eſſet forma extenſa in corpore uitreo ſecundum rectitudinem linearum radialium,
              <lb/>
            propter conſimilιtudinem diaphanitatis:</s>
            <s xml:id="echoid-s1573" xml:space="preserve"> & eſſet refracta propter diuerſitatem qualitatis ſenſus:</s>
            <s xml:id="echoid-s1574" xml:space="preserve"> &
              <lb/>
            ſic eſſet forma propter refractionem monſtruoſa, aut duæ formæ eſſent propter iſtã diſpoſitionem.</s>
            <s xml:id="echoid-s1575" xml:space="preserve">
              <lb/>
            Et cum diuerſitas diaphanitatis affirmet refractionem, & diuerſitas qualitatis ſenſus affirmet illam
              <lb/>
            refractionem aut obliquationem:</s>
            <s xml:id="echoid-s1576" xml:space="preserve"> erit forma poſt refractionem una forma.</s>
            <s xml:id="echoid-s1577" xml:space="preserve"> Et propter hoc diuerſa-
              <lb/>
            tur diaphanitas corporis uitrei, & diaphanitas corporis anterioris glacialis.</s>
            <s xml:id="echoid-s1578" xml:space="preserve"> Formę ergo perueniũt
              <lb/>
            ad uitreum ordinatæ, ſecũdum ordinationem earum in ſuperficie uiſi:</s>
            <s xml:id="echoid-s1579" xml:space="preserve"> & recipit ipſas iſtud corpus,
              <lb/>
            & ſentit ipſas:</s>
            <s xml:id="echoid-s1580" xml:space="preserve"> deinde refringitur forma propter diuerſitatem diaphanitatis, & diuerſitatem ſenſus
              <lb/>
            iſtius corporis, & ſic peruenit forma ſecũdum diſpoſitionem ſuam:</s>
            <s xml:id="echoid-s1581" xml:space="preserve"> deinde extenditur iſte ſenſus,
              <lb/>
            & iſtæ formæ per hoc corpus, quouſq;</s>
            <s xml:id="echoid-s1582" xml:space="preserve"> perueniat iſte ſenſus, & iſtæ formæ ad ultimum ſentiens:</s>
            <s xml:id="echoid-s1583" xml:space="preserve"> &
              <lb/>
            erit extenſio ſenſus & extenſio formæ in corpore uitreo, & in corpore ſentiente extẽſo in concauo
              <lb/>
            nerui, ad ultimum ſentiens, ſicut extenſio ſenſus tactus & ſenſus doloris ad ultimum ſentiens:</s>
            <s xml:id="echoid-s1584" xml:space="preserve"> ſen-
              <lb/>
            ſus autem tactus & ſenſus doloris non extenduntur à membris, niſi in filis neruorum, & in ſpiritu
              <lb/>
            extenſo ſecundum iſta fila.</s>
            <s xml:id="echoid-s1585" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div59" type="section" level="0" n="0">
          <head xml:id="echoid-head83" xml:space="preserve" style="it">6. Humor uitre{us} & ſpirit{us} uiſibilis eadem ferè perſpicuitate præditi ſunt. 22 p 3.</head>
          <p>
            <s xml:id="echoid-s1586" xml:space="preserve">ET formæ rerum uiſibilium quãdo peruenerint in corpus humoris uitrei, extendetur ſenſus
              <lb/>
            ab illo membro in corpus ſentiens, extenſum in concauo nerui continuati inter uiſum & an-
              <lb/>
            terius cerebri:</s>
            <s xml:id="echoid-s1587" xml:space="preserve"> & ſecundum extenſionem ſenſus, extenduntur formæ ordinatæ ſecundum
              <lb/>
            ſuam diſpoſitionem:</s>
            <s xml:id="echoid-s1588" xml:space="preserve"> quoniam corpus ſentiẽs naturaliter ſeruat ordinationem iſtarum formarum.</s>
            <s xml:id="echoid-s1589" xml:space="preserve">
              <lb/>
            Et iſta ordinatio conſeruatur in corpore ſentiente:</s>
            <s xml:id="echoid-s1590" xml:space="preserve"> quoniam ordinatio partium corporis ſentien-
              <lb/>
            tis, recipientium partes formarum, & ordinatio uirtutis recipientis, quæ eſt in partibus corporis
              <lb/>
            recipientis, eſt in corpore uitrei, & in omni corpore ſubtili extenſo in cõcauo nerui, ordinatio con-
              <lb/>
            ſimilis.</s>
            <s xml:id="echoid-s1591" xml:space="preserve"> Et cum ita ſit, quãdo forma peruenit ad quodlibet punctum ſuperficiei uitrei, curret in uer-
              <lb/>
            ticatione continua, & non alterabitur eius ſitus in concauitate nerui, in quo extenditur corpus ſen
              <lb/>
            tiens:</s>
            <s xml:id="echoid-s1592" xml:space="preserve"> & erunt omnes uerticationes iſtæ, per quas currunt omnia puncta, quæ ſunt in forma, conſi-
              <lb/>
            milis ordinationis interſe:</s>
            <s xml:id="echoid-s1593" xml:space="preserve"> & erunt omnes iſtæ uerticationes gyrantes apud gyrationem nerui:</s>
            <s xml:id="echoid-s1594" xml:space="preserve"> &
              <lb/>
            erunt apud gyrationem ordinatæ ſecundum ſuam ordinationem ante gyrationem, & poſt, propter
              <lb/>
            qualitatem ſenſus iſtius corporis:</s>
            <s xml:id="echoid-s1595" xml:space="preserve"> & ſic perueniet forma ad neruum communem ſecundum ſuam
              <lb/>
            diſpoſitionem.</s>
            <s xml:id="echoid-s1596" xml:space="preserve"> Et non eſt poſsibile, ut ſit extenſio formarum uiſibilium uſq;</s>
            <s xml:id="echoid-s1597" xml:space="preserve"> ad ultimum ſentiens,
              <lb/>
            niſi ſecundum hunc modum:</s>
            <s xml:id="echoid-s1598" xml:space="preserve"> quoniam nõ eſt poſsibile, ut formæ perueniant ad neruum commu-
              <lb/>
            nem ſecundum ſuum eſſe, niſi ſit extenſio earum ſecundum hunc modum.</s>
            <s xml:id="echoid-s1599" xml:space="preserve"> Et cum formæ exten-
              <lb/>
            </s>
          </p>
        </div>
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    </echo>
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