Casati, Paolo
,
De igne dissertationes physicae
,
1686
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De ignis natura
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Naturę ſimplices diſtinctè & </
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<
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">Gradon. </
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">Illud pręterea, quod dictis conſequens videtur, non
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diſſimulandum exiſtimo, videlicet ſingulas Elementorum notiones,
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Terram, Aquam, Aërem, Ignem, non eſſe ſpecies vltimas: </
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<
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">ita enim
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ſunt partes, quę ſubſunt generi Elementi, vt etiam ſingulę ample-
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ctantur plures ſpecies: </
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<
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">Sic Terra genus eſt in plures diuiſum partes:
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</
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<
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">& </
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<
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">ſicut terra Lemnia, aut Samia, aut communis argilla ad ſpeciem
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eandem non pertinent, quamuisin communi Terrę notione conue-
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niant; </
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<
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">ita plures ſpecies vniuerſum genus Elementi Terrę partiri
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poſſunt, modò Primarum Qualitatum terrę congruentium, Frigo-
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ris ſcilicet & </
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<
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">Siccitatis, communione ſimiles ſint, cœtera diſſimi-
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les; </
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<
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">ſi nimirum ſingulę hoc habeant, quod ęgrè miſceantur, ac
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vim obtineant tenuiora elementa conſtipandi, &</
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<
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">, vt ita dicam,
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coagulandi, parui refert eas cœterarum proprietatum diſſenſione
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diſcrepare. </
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<
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xml:space
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">Haud diſpari ratione de Ignis cœterorumque Elemen-
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torum generibus philoſophandum eſt; </
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<
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">quęcunque enim naturę
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ſimplices validam vim habentreliquas attenuandi, ipſę tamen ob
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maximam ſui tenuitatem ac mobilitatem difficilè permiſcentur,
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ſed potiùs auolare conantur, Ignes ſunt: </
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<
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">ſed quid prohibet eas, in
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reliquis qualitatibus longè diſſimiles, ſpecie diſiunctas eſſe, immò
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& </
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">illud addendum, quod non ignes omnes calo-
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ris gradibus pares eſſe, aut ęquè tenues oportet; </
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">ſed in vnoquoque
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compoſitorum corporum quę inſunt particulę omnium tenuiſſimę
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calorem habentes, cuius cauſas ipſa natura continet, eæ in corpore
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illo Elementi Ignis munere funguntur; </
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">neque obſtat quicquam,
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quo minus ignis ſint, ſi corpora alia concreta ſunt ex particulis
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plus caloris habentibus, & </
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">ignem enim alium alio ro-
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buſtiorem eſſe nil vetat.</
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">Equidem fateor eam eſſe vim notionum in animis noſtris
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iam tum ab ipſâ infantiâ impreſſarum, vt vix Ignis vocabulum au-
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dire poſſimus, quin illicò menti ſpontè ſuâ obijciat ſe ignis iſte vul-
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garis, nec facile ſit cogitationem ab illo ſeuocare, & </
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reflectere. </
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<
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">Quapropter aliquibus ſatius videtur, rebus non muta-
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tis, paululum immutare vocabula, ijſque vti nominibus, quę co-
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gitationem ad alienas imagines non detorqueant. </
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<
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">Cum itaque ex
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corporum diſſolutionibus ab arte excogitatis deprehendatur hu-
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morem extrahi, atque ſpiritum, relicιis in imo vaſe partibus qui-
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buſdam craſſis & </
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