Biancani, Giuseppe, Aristotelis loca mathematica, 1615

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              <s id="s.002144">
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              faciunt ij, qui has demonſtrationes
                <expan abbr="abſq;">abſque</expan>
              vlla libri Datorum mentione ex­
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              plicare conantur, cum manifeſtè illo innitantur.</s>
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              <s id="s.002145">Cæterum ſi quis breues, ac dilucidas harum rerum demonſtrationes re­
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              quirat, is legat 74. 75. 76. propoſitiones 10. Vitell. vel ſequentem noſtram
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              de Iride additionem. </s>
              <s id="s.002146">ego enim longiorem hanc,
                <expan abbr="atq;">atque</expan>
              impeditam Ariſt. tra­
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              ctationem in gratiam textus illius, vt inſtituti mei ratio poſtulabat, perſe­
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              quutus ſum.</s>
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            <p type="main">
              <s id="s.002147">
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              181</s>
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              <s id="s.002149">Ibidem
                <emph type="italics"/>
              (Quod autem in minoribus quidem diebus ijs, qui poſt æquinoctium au­
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              tumnale
                <expan abbr="cõtingit">contingit</expan>
              ſemper fieri Iridem: in longioribus aurem diebus ijs qui ab æqui­
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              noctio altero, ad æquinoctium alterum circa meridiem non fit Iris, cauſa est, quia
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              quæ ad Vrſam ſectiones omnes maiores ſunt ſemicirculo, & ſemper ad maiores quod
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              autem eſt occultum, paruum: quæ autem ad æquatoris meridiem ſectiones, quæ qui­
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              dem ſupra ſectio, parua; quæ autem ſub terra magna, & ſemper maiores, quæ lon­
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              gius. </s>
              <s id="s.002150">quare in ijs, qui ad æſtiuas verſiones diebus propter magnitudinem ſectionis,
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              antequam veniat G, ad medium ſectionis, infra iam pœnitus fit P; propterea quod
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              longè diſtat à terra meridies propter magnitudinem ſectionis. </s>
              <s id="s.002151">In ijs autem diebus,
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              qui ad hyemales verſiones, quia non multŭμ ſunt ſupra terram ſectiones circulorum,
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              contrarium neceſſarium fieri, modicum enim eleuato in quo G, in meridie fit Sol)
                <emph.end type="italics"/>
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              quærit cur poſt æquinoctium autumnale vſque ad vernum, hoc eſt hyemali
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              tempore, Iris appareat etiam Sole meridiem occupante: reliquo autem
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              tempore æſtiuo, quod eſt ab æquinoctio verno ad autumnale appareat tan­
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              tum Sole vel in ortu, aut occaſu exiſtente, vel parum ſupra terram ſublato.
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              </s>
              <s id="s.002152">cauſa autem huius refert in ſectiones parallelorum circulorum, quos Sol
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              diurno motu inter
                <expan abbr="vtrunq;">vtrunque</expan>
                <expan abbr="tropicũ">tropicum</expan>
              deſcribit: nam ſectiones parallelorum,
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              qui ſunt ad Vrſam, ideſt in parte ſphæræ Boreali, qui omnes ſunt inter æqua­
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              torem, & tropicum Cancri; ſectiones inquam horum circulorum, quæ ſunt
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              ſupra horizontem, maiores ſunt ſectionibus infra horizontem depreſſis, &
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              ſemper eò maiores, quò propiores ſunt Cancro, ita vt magna valdè ſit ea
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              portio, quæ eſt ſupra terram, exigua verò admodum, quæ infra (intelligan­
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              tur hæc in ſphæra obliqua, cuius polus eleuetur grad. 45. circiter) quare
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              quando aſtrum G, conſcenderit meridiem, adeò P, polus Iridis, & etiam
                <foreign lang="grc">ω,</foreign>
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              centrum eius infra terram deprimitur, vt aut nihil, aut inſenſibile quid de
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              Iridis ambitu ſupra terram eleuari poſſit, contrarium accidit in parallelis
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              meridionalibus, quia eorum ſectiones ſuperiores ſunt ſemper inferioribus
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              minores, quapropter etiam ſi aſtrum ad meridiem eleuetur, parum tamen
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              attollitur, & conſequenter centrum
                <foreign lang="grc">ω,</foreign>
              Iridis parum infra horizontem
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              deſcendit, ac propterea etiam in meridie pars ipſius ſatis ma­
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              gna conſpicitur. </s>
              <s id="s.002153">quæ omnia adhibita ſphæra materia­
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              li, eaque aſtronomicè ad ſuam eleuationem
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              accommodata, nullo negotio li­
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              cebit intueri.</s>
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