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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calis à Meria
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iano, vt ſupra oſtendimus; </
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ticalis à Verticali proprie dicto.</
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in meridiẽ ſpe-
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ctat, & Sol au-
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ſtralior eſt quá
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Verticalis pro-
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prie dictus, ob-
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@eruatioq; fit a@
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te meridiem.</
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didimus) & </
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ctum repertus fuerit, ita vt tam murum, quàm Verticalem proprie dictum ex parte auſtrali illuminet,
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atque obſeruatio fiat ante meridiem, conferemus angulum T R H, cum angulo C D G, quem in muro in-
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uenimus. </
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cum eadem inuenta ſit declinatio Verticalis per Solem tranſeuntis à muro, & </
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Si autem angulus T R H, deprehenſus fuerit maior angulo C D G, erit murus ex parte Orientali inter
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Verticalem proprie dictum & </
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auſtr ali magis tunc diſtet Verticalis per Solem ductus à Verticali proprie dicto, quàm à muro. </
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angulum C D G, id eſt, declinationem, quam Verticalis per Solem ductus habet à muro, demamus ex an-
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gulo T R H, hoc est, à declinatione, quam idem Verticalis per Solem ductus habet à Verticali proprie
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dicto, reliquus erit angulus declinationis muri à Verticali proprie dicto, & </
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denique angulus T R H, angulo C D G, minor fuerit, erit Verticalis propriè dictus ex parte orientali
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inter murum & </
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Verticalis per Solem ductus à muro, quàm à Verticali proprie dicto. </
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in ortum.</
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us
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in meridiẽ ſpe-
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ctat, & Sol in
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Verticali pro-
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priè dicto exi-
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ſtit, obſerua-
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tioque fit ante
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adhuc murum illuminet ex parte auſtrali, Verticalem autem proprie dictum nullo modo, erit angulus
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inuentus C D G, angulus declinationis muri à Verticali propriè dicto, & </
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ex parte orientis auſtralior eſt Verticalis propriè dictus, in quo nimirum Sol existit, quàm murus.</
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in meridiẽ ſpe-
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ctat, & Sol bo-
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realior eſt, quã
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Verticalis pro-
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prie dictus, ob-
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ſeruatioq́; fit an
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te meridiem.</
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dictum ſit conſtitutus, ita vt murum quidem illuminet ex parte auſtrali, Verticalem verò propriè di-
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ctum ex boreali, exiſtet Verticalis, in quo Sol eſt, inter murum, & </
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orientis, quia ille Verticalis auſtralior tunc eſt, quàm murus, & </
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cali primario, & </
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