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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arcus diurnus tropici ♑, rurſumq́; </
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<
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<
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">ęquales ſecetur, initio factoà ter
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mino occidẽtali arcus diurni tropici ♑, vt à puncto E, in orientali horologio, & </
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<
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inueniemus in tropico ♑, horas Italicas. </
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<
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neis rectis, deſcriptum erit horologiũ Italicũ. </
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<
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">Tranſibunt autem neceſſario hæ lineæ horariæ per
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puncta horarum à meridie, vel media nocte in linea æquinoctiali, vt hora 9. </
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<
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<
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dia nocte; </
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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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">cui titulus eſt, ÆQVINOCTIALIS LINEA. </
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<
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ab occaſu in alterutro tropicorum non habeant in altero tropico puncta reſpondentia, ducendæ
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erunt illæ per horas reſpondentes in æquinoctiali linea, prout ex tabula dicta propoſ. </
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<
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ris lib. </
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<
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<
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">ductæ ſunt per puncta in tropico
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♑, inuenta, & </
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<
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">à media nocte in linea æquinoctiali, quia in tropico ♋, non ha
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bent puncta reſpondentia. </
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<
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">ducenda eſt per punctum in tropico ♑, inuen
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tum parellela lineæ æquinoctiali, vt conſtat. </
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<
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">ab ortu, vel occaſu
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cum Aequatore eandem habeant ſectionem communem, per propoſ. </
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<
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dem cum Meridiano, per propoſ. </
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<
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duntaxat communem ſectionem; </
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">Aequator, Meridianusq́; </
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& </
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<
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">eandem communem ſectionem, nempe eam, quæ communis ſectio eſt quoque Meridiani, & </
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A equatoris. </
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">Cum ergo planum horologii Meridiani huic ſectioni communi æquidiſtet, nempe
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ipſi Meridiano circulo; </
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<
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<
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cum plano horologii, cuiuſmodi ſunt linea horæ 6. </
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<
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<
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<
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æquinoctialis, inter ſe parallelæ.</
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<
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eiuſdem horo-
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logii Italici Me
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ridiani per ar-
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cus diurnos, no
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cturnosq̃
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ue ho-
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rarũ 14. & 10.
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Item 24.</
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<
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Italicum, vt in horologio horizontali, & </
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rum duorum, quorum vnus eſt ſemper apparentium maximus, vel arcus diurnus horarum 24. </
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ter verò maximus perpetuo deliteſcentium, ſeu arcus nocturnus horarum 24. </
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deſcribantur in horologio. </
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<
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