Casati, Paolo
,
De igne dissertationes physicae
,
1686
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De Luce Ignis.
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dixiſſet, Diaphanum eſſe id, quod eſt aſpectabile propter lumen,
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lumen verò, quod definit *Actum Diaphani, quâ Diaphanum eſt,*
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eſſe id, per quod Diaphanum conſtituitur Diaphanum, hoceſt,
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aſpectabile propter lumen. </
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<
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xml:space
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">Quæ definiendi ratio longè abeſt à Phi-
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loſophi Sapientiâ. </
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<
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xml:space
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">Sed Interpretes miſſos faciamus; </
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">& </
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<
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xml:space
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bo, cum *Perſpicuum* dicimus, hæc ſubiecta ſit notio, *quod cor-*
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*poris diſſiti aſpectum non impedit, etiamſi inter illud & </
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<
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*terijciatur;</
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<
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xml:space
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">* neque enim alia videtur eſſe Diaphani ratio, quà Dia-
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phanum eſt; </
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<
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xml:space
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">cum videndi quippe facultate confertur id, quod
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apparet, & </
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<
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">aſpicitur; </
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<
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">idcirco tranſparens & </
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<
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">perſpicuum illud eſt,
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trans quod, & </
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">per quod videri aliquid poteſt. </
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<
s
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xml:space
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">Quare autem per
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aërem volantes auiculas, per aquam natantes piſces, per feneſtra-
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rum vitra, quid ab hominibus in proximâ plateâ agatur, proſpi-
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cere valeamus; </
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<
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">contra verò nos lateant & </
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">ſcena, quæ ſipario ob-
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tenditur, & </
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">ſub nauigij foris collocatæ merces, & </
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">captiui in fer-
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reâ arcâ theſauri, vno verbo, quare hæc quidem corpora perſpi-
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cua ſint, illa autem opaca, non ſatis explicari poſſe exiſtimo, niſi
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etiam, qua ratione lux propagetur innoteſcat. </
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<
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xml:space
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">Illud ratum ac fir-
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mum ſit, lucis rationem, quamuis per ſe aſpectabilis ſit, per ſe
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tamen & </
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<
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xml:space
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">proximè ad videndi facultatem non referri, perſpicuum
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vero, quâ peſpicuum eſt, aſpectui reſpondere: </
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no Claudianus cecinit</
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">Denſus nube ſuâ, tactuque immitis, & hauſtu,
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Sed vitreis idem lucidus vſque vadis.
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Conſuluit Natura ſibi, ne merſa lateret,
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Admiſitque oculos, quò vetatire calor.</
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">Ante omnia ſtatuere oportet, vtrum Lux Natura quæ-
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dam ſit, an veròijs, quæ naturæ alicui attribuuntur, & </
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<
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">in Scho-
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lis Accidentia paſſim dicuntur, annumeranda ſit. </
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">Et quidem
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primam illam lucem (de qua loquens S. </
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</
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<
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">ait *Prima Dei uox lucis naturam creauit,* pauciſque interiectis
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addit, *Aër autem omni ex parte illuſtrabatur; </
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<
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">immò uerò totam*
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*immixtam ſibi per omnia lucem babebat)* corpus quoddam fuiſſe,
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quod & </
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<
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">aëri commiſceretur, ſplendorem vſque-
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quaque emittens, plurimi Sacrorum librorum Interpretes opinan-
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tur, atque ipſa Diuini imperij forma, *Fiat lux,* ſatis apertè indi-
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cat; </
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