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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vero minor est altitudo poli declinatione maxima Solis, cadit locus ſtyli inter tropicum, & </
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lem lineam: </
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<
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nea æquinoctiali. </
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<
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<
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<
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">Quia enim in eo altitudo poli A F, maior eſt maxima Solis declinatione, fit vt radius ♋, per centrum D,
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emiſſus cadat in lineam meridianã R O, ad punctum K, vltra locum ſtyli G, ita vt punctum G, ſit inter
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H, centrum horologii, & </
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do poli A F, æqualis eſſet maximę Solis declinationi, ita vt diameter paralleli ♋, ſecaret Meridianũ
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in puncto A, non differret radius ♋, ex A, per centrum D, eiectus a diametro Verticalis; </
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<
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locus styli eſſet in puncto G, vbi radius ♋, meridianam lineã ſecaret. </
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<
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maxima declinatione Solis, ita vt diameter paralleli ♋, Meridianum ſecaret inter A, verticem, & </
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lum mundi E, liquido conſtat, radium ♋, per centrum D, tranſeuntem cadere tunc inter H, centrum ho
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rologii, & </
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<
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">Si denique altitudo poli nulla foret, ita vt diameter Aequatoris a diametro Verticalis non differret,
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quis non videt, locum ſtyli tunc cadere in illud punctum lineæ meridianæ, in quo Aequator plano horo-
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logij occurreret?</
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