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 SECVNDVS.
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toris; </
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<
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<
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<
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q uatorem, ac proinde & </
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<
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">circulum ſibi concentricũ ex E, deſcriptum partiantur in 12. </
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<
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les, tranſeantq́ue per centrum mundi, in quo nunc punctum E, ponitur. </
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<
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xml:space
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<
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xlink:href
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http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0247-01
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<
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di eirculi plano horologii in punctis, in quibus lineam æquinoctialem ſecant rectæ per E, trãſmiſ-
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ſæ; </
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<
s
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xml:space
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">atque adeo per eadem illa puncta æquinoctialis lineæ tranſibunt communes ſectiones plani
<
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<
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horologii, & </
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<
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<
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xml:space
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mutuo in G, ex propoſ. </
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<
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<
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<
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xml:space
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">quòd horum circulorum communis ſectio, nempe axis
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Verticalis circuli, vel ſectio communis Horizontis, ac Meridiani, plano horologii occurrat in G,
<
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vbi linea meridiana lineam horizontalem ſecat, vt perſpicuum eſt ex portione Analemmatis pro-
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poſ. </
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<
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<
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">huius libri. </
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<
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xml:space
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">Igitur rectæ ex G, per puncta æquinoctialis lineæ eductæ, communes ſectio-
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nes erunt plani horologii, & </
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<
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">circulorum domorum cœleſtium. </
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<
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xml:space
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">Quod eſt propoſitum.</
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<
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</
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<
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xml:space
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leſtium domo-
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rum ſecundum
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Campanum in
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eodem Vertica
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li horologio.</
note
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<
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<
s
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xml:space
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">AT verò ſecundum Campani opinionem, qui circulos domorum cœleſtium ducit per ſectio
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nes communes Meridiani, & </
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<
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xml:space
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">Horizontis diuidentes Verticalem circulum propriè dictum in 12.
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</
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<
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">partes æquales, ita propoſitum exequemur. </
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<
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xml:space
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">Ex G, loco ſtyli circulum cuiuſuis magnitudinis de-
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ſcriptum in 12. </
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<
s
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"
xml:space
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">partes æquales diſtribuemus, initio facto à linea horizontali, vel meridiana. </
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<
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xml:space
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">Nam
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rectæ ex G, per diuiſionum puncta emiſſæ dabunt domos cœleſtes, ſecundum Campanum Quod
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<
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ita oſtendemus.</
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poſterioris de-
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ſcriptionis do-
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morum cœle-
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ſtium.</
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<
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<
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">QVONIAM circuli domorum cœleſtium ſecant Verticalem circulum, ſecundum Campa-
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num, in partes æquales, initio facto à communi ſectione Verticalis, & </
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<
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">Horizontis, atque adeò, & </
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<
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circulum, quem planum horologii Verticali circulo æquidiſtans in ſphæra, per propoſ. </
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<
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<
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</
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<
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<
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">facit, in totidem partes æquales diuidunt, initio facto à linea horizontali, nempe à com-
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muni ſectione plani horologii, & </
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<
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">Horizontis, propterea quòd per polos Verticalis circuli tran-
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ſeuntes diuidant per propoſ. </
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<
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<
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<
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<
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">Theodoſii, Verticalem, eiusq́; </
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<
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">parallelos in ſegmenta ſi-
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milia; </
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<
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">efficitur, vt circuli domorum cœleſtium, atque adeò & </
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<
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">eorum, ac plani horologii commu
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nes ſectiones, tranſeant per puncta diuiſionum circuli ex G, deſcripti; </
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<
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xml:space
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">(Nam punctum G, in quod
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cadit axis Verticalis circuli, centrum eſt circuli ab horologii plano in ſphera procreati, per propoſ. </
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<
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<
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10. </
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<
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<
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<
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<
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">quem ex G, deſcripſimus, in arcus ſimiles diui-
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duntur à rectis lineis è centro G, egredientibus) ac propterea & </
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<
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<
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</
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<
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<
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">in quo nimirum communis ſectio circulorum domorum cœleſtium plano horolo-
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gii occurrit, & </
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<
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idem circuli ſe mutuo ſecant. </
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<
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">Rectæ ergo illæ ex G, emiſſæ per puncta di-
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uiſionum circuli ex G, deſcripti, communes ſectiones erunt plani horologii, ac circulorum domo
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rum cœleſtium, ſecundum Campanum. </
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<
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">Quare domos cœleſtes in eodem horologio Verticali de-
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ſcripſimus. </
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parté
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s domorũ
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cœleſtium in
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eodem horolo-
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gio Verticali de
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ſcribantur.</
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<
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">gradus, ſi quælibet pars duodecima circuli ex E, vel
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G, deſeriptiin 30. </
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<
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">partes, vel pauciores æquales, pro magnitudine horologii, diuidatur, et reliquafiãt, </
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