Biancani, Giuseppe, Aristotelis loca mathematica, 1615

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              per eadem duo extrema puncta K, L, duci poſſunt infiniti circuli maximi.
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              <s id="s.004064">
                <expan abbr="Atq;">Atque</expan>
              hæc eſt Ariſtotelis ſententia, non ſine ingrata tautologia, tandem
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                cunque</expan>
              expreſſa.</s>
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              347</s>
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              <s id="s.004067">In 7. problema
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              (Cur Sol, & Luna plana eſſe videntur, cùm tamen ſphærica
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              ſint? </s>
              <s id="s.004068">An, vt ea omnia, quorum quodnam plus, minuſuè, diſtet, incertum ſit, æquè
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              poſita eſſe videntur? </s>
              <s id="s.004069">ſic etiam res, quamuis vna, cùm plures tamen habeat partes,
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              niſi varius color adſit, partes illæ omnes, ex æquo collocatas videri neceſſe eſt: quod
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              autem ex æquo videtur, neceſſarium etiam eſt æquabile, ac planum apparere)
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              Quæſtionem hanc demonſtratiuè pertractat Vitellio lib. 4. propoſit. </s>
              <s id="s.004070">65. Eu­
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              clides etiam theor. </s>
              <s id="s.004071">25. optices. </s>
              <s id="s.004072">cæterùm textus ſatis clarus videtur: vbi au­
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              tem ait
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              (niſi varius color adſit)
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              hoc ait, quia nonnulli colores ſunt, qui fa­
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              ciunt, vt obiecta appareant prominentiora, & proinde propinquiora; ta­
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              les ſunt colores, qui præ cæteris Iucidiores ſunt: alij verò ſunt, qui obiecta
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              deprimunt, & proinde remouent; cuiuſmodi ſunt colores omnes tenebri­
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              coſi. </s>
              <s id="s.004073">poſito igitur in re viſa eodem colore, partes illius ob magnam diſtan­
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              tiam
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              æqualiter à viſu diſtare, & ideo res plana apparet. </s>
              <s id="s.004074">quia, quam­
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              uis diſtantiæ illæ partium ab oculo ab inuicem differant, tamen parum dif­
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              ferunt, idcircò eas ſenſus iudicat æquales,
                <expan abbr="ſicq́">ſicque</expan>
              ; æqualiter iudicamus diſtare
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              partes remotiſſimæ ſphæræ, quamuis pars illa, cui linea viſualis perpendi­
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              culariter accidit, ſit propinquior; ſiue illa, quæ eſt in medio hemiphærij viſi:
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              partes autem, quæ ſunt circa baſim dicti hemiſphærij ſint remotiores. </s>
              <s id="s.004075">reli­
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              qua ex ſe manifeſta ſunt.</s>
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              348</s>
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              <s id="s.004078">In 8. problema
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              (Cur Sol oriens,
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              occidens vmbras efficit longas; efferens
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              ſe, minores: obtinens cœli medium minimas? </s>
              <s id="s.004079">An quod oriens primo vmbram ter­
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              ræ æquidiſtantem reddit, ac infinitam pęnè protrahit, deinde longam, & poſtea mi­
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              norem ſubinde? </s>
              <s id="s.004080">quia linea recta, quæ de ſuperiori puncto elicitur, interius cadit.
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              ſit Gnomon A B. Sol, vbi C, & vbi D.
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              radius igitur ex C, preficiſcens, eſt C F,
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              & exterius procedit, quàm radius D E.
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              eſt autem vmbra B E, Sole ſublimiori
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              exiſtente: vmbra verò B F, Sole humi­
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              liori. </s>
              <s id="s.004081">ergò quò Sol altior fuerit, eò mi­
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              nor vmbra erit, minimaqué tunc erit, cum
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              Sol ſuper caput noſtrum verſabitur)
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              Problema præſens eſt idem
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              quar­
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              to huius ſectionis: eadem igitur ex­
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              poſitio
                <expan abbr="vtriq;">vtrique</expan>
              inſeruiat. </s>
              <s id="s.004082">hoc ſolum addendum eſt, Gnomonem apud græcos
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              inter cætera ſignificare ſtylum ſolaris horologij: in quo ſenſu hoc loco po­
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              nitur. </s>
              <s id="s.004083">ſignificat præterea amuſſim, ſeu normam, quæ nihil aliud eſt, quam
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              quidam angulus rectus materialis: & quoniam ſtylus horologij figitur ad
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              angulos rectos in plano horizontali, propterea ipſe
                <expan abbr="quoq;">quoque</expan>
              Gnomon appel­
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              latus eſt: imò
                <expan abbr="pleriq;">plerique</expan>
              amuſſim quandam horologijs præſertim viatorijs, lo­
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              co ſtyli accommodant.</s>
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              349</s>
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              <s id="s.004086">In 9.
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              (Cur vmbræ Lunæ maiores, quam Solis ſunt cùm eodem proueniant per­
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              pendiculo? </s>
              <s id="s.004087">An quod Sol ſuperior, quam Luna eſt? </s>
              <s id="s.004088">
                <expan abbr="itaq;">itaque</expan>
              neceſſe eſt radium à ſupe­
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              riore procedentem intus cadere. </s>
              <s id="s.004089">ſit Gnomon A D, Luna B Sol C, Lunæ radius B F.
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