Casati, Paolo
,
De igne dissertationes physicae
,
1686
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An exustione noua ſubſtantia gignatur.
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<
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">Dixerint fortaſſe igneæ illius Formæ aſſertores non eſſe
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flammam cum embammatis aut pigmentis comparandam, hæc
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enim artis ſunt opus, illa Naturæ. </
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<
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xml:space
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">In Meteoris verò, quæ ex for-
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tuitâ halituum concurſione non vno modo coaleſcunt, non opus
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eſſe nouâ Formâ, quemadmodum in Flammâ, cuius certam ori-
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ginem & </
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<
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">molitionem indicare videntur ſigura, motus, calor, lux:
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</
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<
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">porrò Nebulam & </
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<
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">Nubem nil eſſe præter aquæ ſubſtantiam in
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vaporem attenuatæ, qui iterum coactus in Rorem, aut Plu-
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uiam, tellurem perfundit, aut ſi coagulum accedat, in Niuem
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concreſcit, & </
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<
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rationibus nihil addere præter motum; </
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<
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">Irides, Coronas, Virgas,
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Parelia, Paraſelenes, immò & </
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<
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">Cometas ex lucis commiſtione cum
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corpore ſemidiaphano oriri Κα\’τ έ μφασ ιν non autem Καθ’ ύπόςασιν,
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vt Ariſtoteles loquitur lib. </
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<
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">de mundo: </
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xml:space
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Naturâ ſubſtantialem Formam. </
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<
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<
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">quæcunque
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alia Meteora verè ignita ad idem pertinere genus, quo noſtra-
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tes ignes comprehenduntur, atque his propriam Ignis formam
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tribuendam; </
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<
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">neque enim ſuà formâ carere debet elementum
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ignis, quamuis apud nos non purum ſit & </
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<
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">hoc autem
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elementum ſcilicet Ignem, in flammâ ineſſe quis neget? </
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<
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men nullum apparebat in ligno veſtigium.</
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<
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">Quid de Meteorologicis impreſſionibus dicendum ſit,
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nunc quidem non admodum moror, ſingulæ quippe peculiarem
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poſtulant explicationem: </
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<
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">in ligno autem, dum adhuc lignum
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eſt, veſtigia ignis perſequi tunc erit operæ pretium, quando
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methodum, qua contingat exuſtio, indagabimus: </
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<
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hi, ſi nouam ſubſtantialem formam in flammâ non agnoſcamus.
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</
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<
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">Si enim hanc noua forma componat, Formam corrumpat ne-
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ceſſe eſt virtus illa eſſiciens, quæ flammam extinguit: </
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<
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">illa igitur
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eadem virtus aliam pariter formam efficit, quæ pereuntis in lo-
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cum ſuccedat; </
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<
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">flammâ nimirum in auras abeunte, negare quis
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velit, quin ſit aëris, aut alia quæpiam forma in materiâ, quam
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priùs ignis formâ imbutam aſſerebat? </
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<
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">Quis autem facilè ſibi per-
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iuadeat breuiſſimo temporis puncto nouam aëris formam effici, ſi-
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uè ab aquâ ſuperfuſâ extinguatur flamma, ſiuè ab arenæ vi non
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modicâ iniectâ opprimatur, ſiue conuerſâ deorſum face à ceris
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liquentibus propellatur, ſiue emunctorio aut digitis compreſſo
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ellychnio præfocetur, ſiuè ſpiritu validiùs immiſſo exſuffletur?</
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