Biancani, Giuseppe, Aristotelis loca mathematica, 1615

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              <s id="s.004014">
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              culum coaleſcent. </s>
              <s id="s.004015">nunquam tamen ad geometricam rotunditatem perue­
                <lb/>
              nient, quamuis illam ſenſui obijciant.</s>
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            <p type="main">
              <s id="s.004016">Aliter Ioannes Keplerus totam hanc demonſtrationem inſtituit, quem tu
                <lb/>
              in ſuis ad Vitellionem Paralipom. conſule. </s>
              <s id="s.004017">eius tantum experientiam non
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              iniucundam, qua iſtud probat, non grauabor referre. </s>
              <s id="s.004018">cap. igitur ſecundo
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              de Figuratione lucis hæc habet: librum in ſublimi locaui, qui eſſet loco lu­
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              centis corporis, hunc inter & pauimentum figebatur tabella foramine mul­
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              tangulo. </s>
              <s id="s.004019">filum deinde ex vno libri angulo per foramen in pauimentum de­
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              miſſum, ita incidebat in pauimento, vt terminos foraminis raderet, cuius
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              veſtigia creta imitabar; qua ratione creabatur figura in pauimento ſimilis
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              foramini. </s>
              <s id="s.004020">Idem accidebat, annexo filo ex altero, tertio, quarto libri angu­
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              lo,
                <expan abbr="adeoq́">adeoque</expan>
              ; ex infinitis marginum punctis. </s>
              <s id="s.004021">
                <expan abbr="Itaq;">Itaque</expan>
              infinitarum in pauimento
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              figurarum foraminis exilium ſeries adumbrabat magnam, & quadrangulam
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              libri figuram. </s>
              <s id="s.004022">hic primus eſt in hoc labore ſucceſſus. </s>
              <s id="s.004023">hæc ille; ex quibus po­
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              ſtea ſuam demonſtrationem adornauit. </s>
              <s id="s.004024">His igitur perſpicuè demonſtratis
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              facilè erit nonnulla corollaria inde contexere.</s>
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            <p type="main">
              <s id="s.004025">Primum, ſi ad planum F E, radius perpendiculariter incidat, illuminatio
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              erit circulus, ſi verò obliquè ellipſis, vt in tertio loco vidimus. </s>
              <s id="s.004026">cùm igitur
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              pauimentis, ac parietibus hæ illuminationes, vt plurimum obliquè acci­
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              dant, ideò ferè ſemper ouales apparent.</s>
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              <s id="s.004027">Secundum, quod quidem magni momenti eſt, eſt enim, vti ſcientiam de­
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              cet, vniuerſale, quod enim oſtenſum eſt de Sole, eodem modo oſtendi poteſt
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              de quouis lucido, & de quouis corpore illuminato ſuam ſpeciem diffunden­
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              te. </s>
              <s id="s.004028">ſimili enim modo demonſtrare poſſumus cur Sol eclypſim patiens, illu­
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              minationem pariter eclypſatam efficiat, & inuerſam. </s>
              <s id="s.004029">eadem eſt ratio de
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              Lunæ illuminationibus.</s>
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              <s id="s.004030">Tertium, & quidem ſcitu digniſſimum
                <expan abbr="quodq;">quodque</expan>
              hactenus doctorum viro­
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              rum ingenia latuit, rationem reddere hinc poſſumus, cur ſi feneſtris omni­
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              bus obſeratis, conclaue obſcurum reddatur, tenui tantùm relicto forami­
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              ne, per quod externo lumini aditus patent, formæ externarum rerum pro­
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              priæ, quamuis inuerſæ, in oppoſito plano, appareant. </s>
              <s id="s.004031">eadem ſcilicet de cau­
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              ſa, qua & Solis imago propria,
                <expan abbr="quoniã">quoniam</expan>
              videlicet per ſingula foraminis pun­
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              cta, vt tertio loco patuit,
                <expan abbr="vnaquæq;">vnaquæque</expan>
              res, ſeu lucida, ſeu illuminata tantùm
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              ſit, per ſingula foraminis puncta, ſingulas proprias emittit imagines, quæ
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              omnes poſtea in vnam ex iuſta diſtantia coaleſcunt. </s>
              <s id="s.004032">
                <expan abbr="atq;">atque</expan>
              eadem ratione in­
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              uertuntur. </s>
              <s id="s.004033">ob quam etiam rationem ſolares maculæ in Solis ſplendoribus,
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              non eodem ſitu quem in Solis diſco obtinent, ſed inuerſo ſpectantur. </s>
              <s id="s.004034">atque
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              hæc pro inſtituto dicta ſufficiant.</s>
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              <s id="s.004035">
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              346</s>
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            <p type="main">
              <s id="s.004037">In 6. Problema. </s>
              <s id="s.004038">quoniam vulgata interpretatio videtur mendoſa, cum in
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              multis textui græco non conſentiat, eam ſic emendatam accipe
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              (Cur Lunæ
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              ſphærica exiſtente, rectam cum ſemiplena eſt, cernimus? </s>
              <s id="s.004039">An quoniam eodem in
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              plano aſpectus noster verſatur, vt circuli ambitus, quem Lunæ Solingruens facit,
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              quod cùm accidit, Sol recta linea videtur; cum enim quid ſuum aſpectum ſphæræ
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              admouerit, orbem videre neceſſe ſit; Luna autem ſphærica ſit, eamqué Sol aſpiciat;
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              orbis profectò id eſſe debet, quod à Sole efficitur. </s>
              <s id="s.004040">Hic ergò cum è regione ſe nobis
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              præbet, totus videtur, & ſic plenilunium apparet, cùm autem mutatur propter
                <emph.end type="italics"/>
              </s>
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          </chap>
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