Clavius, Christoph
,
Gnomonices libri octo, in quibus non solum horologiorum solariu[m], sed aliarum quo[quam] rerum, quae ex gnomonis umbra cognosci possunt, descriptiones geometricè demonstrantur
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GNOMONICES
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A B C D, eoſdem habeant polos) incedentes, atque per centrum E, (quòd omnes circuli maximi
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per polos paralleli A B C D, tranſeuntes ipſum diuidant bifariam, hoc eſt, per centrum, & </
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gulos rectos, per propoſ. </
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<
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">æquales, ita vt Meridianus tranſeat per
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rectam A C. </
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<
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">Dico hos circulos maximos indicare horas æquales à meridie, vel media nocte nu-
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meratas. </
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<
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<
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">parallelorũ omniũ, ſecabunt omnes paral-
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lelos, per propoſ. </
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<
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">Ac propterea cùm partes paralleli A B C D,
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ponantur æquales, erunt & </
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">partes cuiuslibet paralleli inter ſe æquales. </
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no æqualibus 24. </
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<
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">temporibus percurret, initio facto à meridie, vel media nocte: </
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<
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pora æqualia, horæ ſunt æquales 24. </
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">à meridie, vel media nocte inchoatæ. </
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ximi, horas æquales 24. </
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ximi in ſphæra, quorum vnus ſit Meridianus, &</
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diatas partes,
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quartas, octa-
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uas, &c. horarũ
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à mer, uel med.
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noc. indicantes.</
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fariam, & </
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">polos paralleli A B C D, circuli maximi, indi-
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cabunt hi horas dimidias, quartas partes horarum, octauas, & </
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<
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à mer. vel med.
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noc.</
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eſt demonſtratio partium, at que horarum integrarum. </
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die, vel media nocte appellari poſſunt.</
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<
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">CAETERVM horum circulorum ſemicir culi inter duos polos mundi collocati, quos quidem om-
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li ad horas. à
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meridie, & qui
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ad horas à med.
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noc. pertineant.</
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nes axis mundi dirimit, procedendo à Meridiani ſemicir culo ſupra Horizontem extante per occidentem
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vſque ad ſemicirculum Meridiani infra Horizontem, indicant horas à meridie, reliqui verò ſemicirculi
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eaſdem horas à media nocte, vt perſpicuum eſt. </
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<
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ximi parallelorum ſemper apparentium conueniant horis à meridie, & </
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beantur. </
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cto verſus C, ita vt D, ad occaſum, & </
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<
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