Casati, Paolo
,
De igne dissertationes physicae
,
1686
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De ignis natura
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genus vniuerſum à ſubiectis partibus abſtractum circumſcribere ac
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definire poterit, certaſque in ſpecies partiri. </
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">Cum itaque non in
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controuerſiâ verſetur, vtrùm natura quæpiam ſub ignis genere
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conſtituenda ſit, nec ne (id enim ex præcognitâ aut præſtitutâ
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Ignis notione definiendum eſſet) ſed illud tantùm in quæſtionem
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vocetur, quid ſcilicet ignis vocabulo declaretur; </
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<
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">operæ pretium
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fuerit naturas illas, quæ in ignium cenſu deprehenduntur, certas
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in claſſes diſcriminare, vt ijs inter ſe collatis, quid Ignis ſit, in-
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noteſcat.</
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">Dand. </
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">modò nos non obſtringamus minutis
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quibuſdam ſeuerioris logicæ legibus De Definitione & </
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">Diuiſione:
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<
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">vt quid enim inani lab ore nos conficiamus? </
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">Satis fuerit, ſi preſſa
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Definitio non occurrat illam non ſolicitè indagantibus, vti Deſcri-
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ptione, quæ Ignem à Non Igne ſecernat. </
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<
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xml:space
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">Et primùm quidem Ignes
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diſtinguere poſſumus locis, in quibus vel gignuntur, vel ſe exhi-
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bent contemplandos. </
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">Hinc alij Terreſtres, qui vel in extimâ tel-
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luris facie excitantur, vel in imis cauernarum latebris deliteſcunt,
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vel è ſummis montium crateribus erumpunt, vel in ſilicum alio-
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rumque lapidum venis ab ſtruſi, quaſi flammæ ſemina in horreis re-
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condita, otiantur, vel corporibus inſiti, cœteriſque elementis per-
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miſti, ac in vnam ſpeciem temperati, calorem, quo naturæ ſubſi-
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ſtunt, fouent. </
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">Alij Aërij, qui ſub lime geniti vel breui ſpectaculo
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oculis blandiuntur, vt Traiectiones, vellongiore morâ magnorum
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periculorum metum portendere videntur, vt Cometæ, vel innoxiâ
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flammâ inter nubes coruſcant, vt Fulgura, vel nubium conflictu
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expreſſi in terras ſe emittunt, vt Fulmina. </
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<
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">Alij demum Cœleſtes,
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ea nimirum ſydera, quæ non alienam lucem mutuata ſuis micant
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ardoribus, quorum Sol principatum obtinet, dein Aſtra certis lo-
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cis infixa, poſtremò illa, non re, ſed vocabulo, errantia, ſiqua ſunt,
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quæ aliquid inſiti luminis habeant, præter illud, quod à Sole re-
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cipiunt: </
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">Et, ſi quis non grauatè ferat mentem ab oculis ſeuocare,
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ac intelligentiâ corporei aſpectûs metas tranſgredi, à cœleſtium
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ignium albo expungendum non videbitur Cœlum, quod ab ignis
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ſplendore Empyreum apud omnes ſplendidè audit.</
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poſita, & </
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">nobis fortaſſe aliquando erit non leuis diſputatio, An ſy-
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dera ignibus annumeranda ſint, alia mihi videtur inſtitui poſſe </
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