celeſtibusDe corꝑibus
aliquo mō inobedientē et trāſit libere et facit oꝑatiōes ꝑfectaslud lumē eſt aeris et alioꝝ corꝑmtrāſparentiū ꝑfectiuū. decorātiuū.formaꝝ et figurarū declaratiuū.oculoꝝ letificatiuū oculis lippis ⁊infirmis ē lumē odioſū ⁊ moleſtieillatiuū. hoīm a ſomno. torpore. ⁊ocio excitatiuū. formaꝝ et ſpecieꝝin ſuꝑficie ſpeculi vl̓ politi corꝑisimp̄ſſiuū Nā lumē ad ſuꝑficiē polite mat̓ie ꝑtingens in agulis eqͣlibus ſe reflectit. et oīm ſb̓iectoruꝫformas ibi impͥmit. vn̄ qd̓ extra ēper ſb̓am in ſuꝑficie ſpeculi collocat per imagineꝫ et figurā. lumenetiā eſt ẜm diſpoſitionē mat̓ie qͣmſubintrat īmutatiōis ſuſceptiuumNā eiꝰ claritas intendit̉ in mat̓iaꝑſpicua atqꝫ pura. ⁊ remittit̉ in feculēta materia et obſcura In materia eni diaphona obſtaculū nōinuenit iō per eā irradiās. ꝓpriosfulgores expͥmit et on̄dit vt dicitdiony. Et qͣnto ꝑfectius illi infunditur. tāto latius ex ea refuſa adalia deriuat̉ Accedēs aūt ad groſſiorē materiā illius habꝫ obſcuriorē diſtributiuā aꝑtionē Sic̄ eniꝫcū materie craſſe infūdit̉. capit̉ imperfecte. ita cū ſe effundit ext̓nſecꝰapꝑet obſcure. vn̄ mat̓ie craſſiciesimpedit ꝙ illumīatio recepta diſt̓buat̉/ In purioribꝰ igit̉ ſb̓ſtatijs ꝑfectius apꝑet ⁊ augmētat̉. in groſſioribꝰ minorat̉ Ex quo patꝫ ꝙ apuriſſimis ⁊ ſb̓tiliſſimis materijs.lumē ꝑfecte ꝯp̄hendit̉. a cōpactisꝟo ⁊ obtuſis repulſā pati inuenit̉
Ca. xxxij. de radioAdius ē quidā lumioſusa corꝑe lucido defluxusquo mediāte lux vel lumēſuā ꝑficit actionē vt dicit Gaſiliꝰ.Radius aūt aliꝰ eſt ꝑpendicularꝭ.et rectus qui a corpore luminoſoemiſſus recto et lineari motu ſinediſgreſſione aliqͣ petit centrū. Aliꝰeſt collateralis et cōfractus qui acorꝑe luminoſo exiens et aliquoddiaphanū inueniēs nō recte ꝓcedit ſꝫ obliquat motū ſuum. et iſtaobliquatio vocat̉ radij cōfractioAlius ꝟo eſt reflexus. qui quideꝫa ſuo pͥncipio recte vel oblique ꝓgredit̉ ſꝫ a corꝑe obiecto repellit̉ ⁊reꝑcutit̉. et talis repercuſſio vel repulſa. radij flexio nūcupat̉. vt dic̄auctor ꝑſpectiue Radius itaqꝫ luminoſus eſt mobilis ⁊ agilis ſperricus et orbicularis de ſe rectꝰ maxime ſi fuerit ꝑpendicularis Contingit aūt radiū frangi et obliqͣriet qn̄qꝫ ad partem oppoſitā ꝓijciẜm diſpoſitiōeꝫ materie quā inuenit vel quā tangit Hic radius innube cōcaua ⁊ humida int̓cluſusdiuerſas oꝑat̉ in nube vel in aereformas colores et figuras vt pꝫin coloribus arcus celeſtis qͥ nihilaliud eſt vel eē dicit̉ qͣꝫ ſb̓intratōradioruꝫ in nubem concauam etaquoſā vt dicit̉ in li. meth̓oꝝ. Exſubito ſēper motu radioꝝ et cōtinuo ꝯtingit aerē circūfuſuꝫ igniriet inflāmari maxīe cū cōcurrerintin loco fractionis. Nam radij ibiI