Clavius, Christoph
,
In Sphaeram Ioannis de Sacro Bosco commentarius
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Ioan. de Sacro Boſco.
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min 53. </
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<
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xml:space
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odiaci præciſe fuerit ſemicirculus, erit & </
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ſemicirculus, nimirum grad. </
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<
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<
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arcu maiore quidem, quàm ſit ſemicirculus, minore uero,
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xlink:label
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note-365-01a
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xml:space
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cus Eclipti-
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cæ maior
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eſt ſemicir-
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culo, ſed mi
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nor quàm
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grad. 270.</
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quàm grad. </
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<
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<
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<
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<
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">& </
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reliqui arcus aſcenſio recta adijcienda rurſus ſemicirculo, ut habeatur aſcen-
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ſio quæſita. </
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<
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Inquirenda ſit aſcenſio recta grad. </
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<
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arcus gra. </
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<
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<
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<
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<
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<
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ſio recta, nempe gra. </
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<
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<
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<
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<
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xml:space
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">addita ſemicirculo, dabit aſcenſionem optatam
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grad. </
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<
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<
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<
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<
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xml:space
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nimirum grad. </
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<
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<
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">totidem graduum erit aſcenſio illi debita.</
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<
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<
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<
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denique arcus tres Quadrantes ſuperauerit, minor tamen in-
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">Quando at
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cus Eclipti
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cę maior eſt
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quàm grad.
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270.</
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tegro circulo extiterit, auferendus erit ex toto circulo, ut a gra. </
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<
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">& </
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<
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qui arcus aſcenſio recta iterum ex circulo integro detrahenda: </
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enim quæſita aſcenſio. </
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<
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. </
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<
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eſt, arcus grad. </
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<
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<
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<
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<
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<
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</
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<
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<
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<
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<
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<
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<
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ſionem rectam grad. </
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<
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<
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<
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<
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aſcendet utiq; </
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<
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<
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<
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">Ex his manifeſtum eſt, quanam arte conſtruenda ſit tabula aſcenſionũ re-
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<
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buia aſcen-
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ſionum re-
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ctarum com
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ſtruatur.</
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ctarum, quæ nimirum in ſphæra recta contingant. </
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<
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">Si enim ſupputemus aſcẽſio
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nes omnium arcuum primi Quadrantis Eclipticæ initium ſumentiũ ab ♈, ha-
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bebimus aſcenſiones rectas omnium punctorum primi Quadrantis Eclipticæ.
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</
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<
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">Quòd ſi ſingulas ex ſemicirculo detrahamur, initio facto a maioribus, ſiue po
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ſterioribus, reliquæ erunt aſcenſiones rectæ omnium punctorũ ſecundi Qua-
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drantis Eclipticæ, initio facto a principio ♈, uſq; </
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<
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">ad principium ♎@ Rurſus ſi
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eiuſdem primi Quadrantis aſcenſiones ſemicirculo apponamus, facto initio a
<
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minoribus, ſiue prioribus, conficiemus aſcenſiones rectas omnium punctorum
<
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tertij Quadrantis Eclipticæ, initio facto a principio ♈, vſq; </
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<
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<
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niq; </
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<
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">eaſdem aſcenſiones primi Quadrantis ex toto circulo auferamus, initio
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rurſus facto a maioribus, ſiue poſterioribus, remanebunt aſcenſiones rectæ om
<
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nium punctorum ultimi Quadrantis Eclipticæ, incipiendo abinitio ♈, vſque
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ad finem ♓, ut conſtat. </
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<
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<
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">totus labor conſiſtit in eo, ut inquirantur aſcen-
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ſiones ſingulorum arcuum primi Quadrantis Eclipticæ. </
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<
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giom. </
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<
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">ſupputauit aſcenſiones rectas omnium arcuum Eclipticæ, per ſin-
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gulos gradus procedendo, quam libuit hoc loco apponere, ut ob
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oculos propoſitæ habeantur omnes aſcenſiones arcuum Zodia
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ci, & </
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<
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">deſcenſiones ſphæræ rectæ, nec non meditationes
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cœli in qualibet ſphæra. </
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<
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gnitio utilis eſt, ut ex ijs, quæ in Gnomoni-
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ca noſtra de ſignis aſcendentibus tra-
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didimus, aliqua ex parte per-
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ſpicuum eſſe poteſt.</
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