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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LIBER TERTIVS.
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<
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xml:space
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">EX loco ſtyli K, erigatur ad horizontalem lineam linea perpendicularis K A, ſtylo I K, æqua-
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culorum deſcri
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ptio in eodem
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horologio decli
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nante à Verti-
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cali.</
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lis, & </
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<
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">centro A, ad quodcunque interuallum circulus deſcriptus ſecetur in partes 360. </
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<
s
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xml:space
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">æquales,
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aut in pauciores, pro numero Verticalium, quos horologii magnitudo capere poteſt, (Nos partiti
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eum ſumus in partes 24. </
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<
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">vt ſingula ſpatia complectantur grad. </
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<
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<
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">initio facto à recta, quæ ex cen
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xlink:href
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tro A, per punctum B, vbi linea meridiana, & </
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<
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">horizontalis ſe mutuo interſecant, ducitur, vel etiam
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à recta ex A, per punctum D, vbi lineam horizontalem æquinoctialis ſecat, ducta. </
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<
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">Deinde per cen
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trum A, & </
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<
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">puncta diuiſionum emittantur rectæ occultæ ſecantes horizontalem lineã in punctis,
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<
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quæ diligenter notanda ſunt. </
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<
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">Nam rectæ per hęc puncta ad lineam horizontalem perpendicula-
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res ductæ, vel ipſi meridianæ lineæ parallelæ, dabunt circulos Verticales, hoc eſt, communes ſe-
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ctiones plani horologij, & </
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<
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<
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negotio, ſi horizontali lineæ lineam parallelam ducamus, & </
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<
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">in eam omnia puncta lineæ horizon-
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talis beneſicio circini ex B, ſumpta transferantur, initio ſemper facto à linea meridiana: </
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recta illa in inferiori parte horologij minutis illis lineis diſtincta. </
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<
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na puncta horizontalis lineæ, & </
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<
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neæ meridianæ parallelæ erunt.</
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<
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xml:space
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<
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gii, ita probabimus. </
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<
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ueri, donec cum plano Horizontis coniungatur, atque adeò centrum A, cum vertice ſtyli, ſeu </
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