Clavius, Christoph
,
In Sphaeram Ioannis de Sacro Bosco commentarius
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<
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">CAPVT SECVNDVM
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DE CIRCVLIS, EX QVIBVS SPHAERA
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materialis componitur, & illa ſupercæleſtis, quæ
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per iſtam repræſentatur, componi
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intelligitur.</
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<
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autem circulornm quidam ſunt maiores, qui-
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xml:space
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">Maior cir-
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culus, & mi
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nor in ſphæ
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ra quid.</
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dam minores, ut ſenſui patet. </
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<
s
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">Maior autem circulus in
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ſphæra dicitur, qui deſcriptus in ſuperficie ſphæræ ſuper
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eius centrum diuidit ſphæram in duo æqualia. </
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<
s
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xml:space
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">Minor ue-
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rò, qui deſcriptus in ſuperficie ſphęræ eam non diuidit in
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duo æqualia, ſed in portiones inæquales. </
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<
s
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xml:space
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">Inter circulos
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uero maiores, primo dicendum eſt de Aequinoctiali.</
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<
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">principia, ac ſundamenta
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">Argumen-
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tũ ſecundi
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cap. eiuſdẽ-
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q́ue diuiſio</
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totius Aſtronomiæ; </
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<
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">Nunc uero in hoc ſecundo cap. </
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<
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">explicat decem
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illos circulos primarios, ex quibus ſphæra materialis componitur,
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& </
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<
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">cœleſtis ſphæra, cuius gratia hæc inſtituitur, componi intelligi-
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tur; </
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<
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">quoniam uidelicet ſine his nullo modo cauſæ reddi poſſunt apparentia-
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rum cœleſtium, cuiuſmodi ſunt aſcenſiones, & </
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<
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">deſcenſiones ſignorum, ortus,
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& </
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<
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">occaſus ſiderum, diuerſitas dierum, ac noctium in diuerſis regionibus &</
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</
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<
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">Poteſt autem non incongrue hoc caput in tres particulas diuidi. </
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<
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xml:space
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">In prima
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enim tractat auctor circulos ſphęræ in genere: </
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">In ſecunda de eiſdem circulis
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in particulari diſſerit, explicans ſingulorum nomina, officia, atque utilitates: </
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In tertia deniq; </
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">ſubiungit, in mundo quinque Zonas ex hiſce circulis cõſtitui.</
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<
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itaque in prima parte circulos omnes ſphæræ in maiores, & </
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minores, qui ab alijs dicuntur maximi, & </
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<
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">nõ maximi: </
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<
s
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xml:space
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">quorũ definitiones per-
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ſpicuæ ſunt in litera Ex maioribus circulis, ſiue maximis auctor noſter in ſe-
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cundo hoc capite explicat tantummodo ſex, nempe Aequinoctialem circulũ,
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<
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">Auctor 10.
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tantum cir-
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culos ſphæ-
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ræ conſide-
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rat.</
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Zodiacum, Colurum Solſtitiorum, Colurum æquinoctiorum, Meridianum,
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atque Horizontem: </
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">ex minoribus uero, ſiue non maximis, ſolum qua@uor de-
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clarat, nimirum Tropicum ♋, Tropicum ♑, circulum Arcticum, & </
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Antarcticum. </
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">Atque hos decem circulos ſphæræ breuiter quidem in 1. </
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poſuimus: </
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<
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">nunc uero cum auctore plura de eiſdem dicenda erunt.</
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<
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autem, ut perfectam cognitionem motuum cęleſtium
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adipiſcerentur, præter decem illos circulos primarios, plures alios excogita-
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runt, tum maximos, tum non maximos. </
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<
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">Inter maximos potiſſimum locum
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obtinent hi, qui nunc ſequuntur. </
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<
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, qui per uerticem cu-
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circuli.
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Horarij cir-
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@uli.</
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iuſlibet loci ad ſingula Horizontis puncta deducuntur. </
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<
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, qui totum
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cęlum in 24. </
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<
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">horas ſecant, atque hi ſunt in triplici differentia. </
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<
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buunt cęlum in 24. </
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<
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">horas æquales, initio facto à meridie, quo pacto incedunt
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per polos mundi: </
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<
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">horas æquales, incipiendo ab ortu, uel occaſu So-
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lis, qua ratione contingunt duos circulos parallelos, quorũ unus eſt </
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