Casati, Paolo
,
De igne dissertationes physicae
,
1686
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Quomodo Ignis accendatur.
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noſque conſtituant, ſatis eſſe poſſunt Phyſicæ contemplationi
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Idcirco tria Principia Actiua & </
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">Calida Salem, Sulphur, atque Spi-
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ritum, tria Paſſiua & </
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<
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xml:space
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">Frigida Terram, Aquam, atque Spiritum Fri-
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gidum admittenda eſſe exiſtimo. </
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<
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xml:space
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">Et quidem ex vino generoſo, ſi
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per octiduum digeratur in vaſis circulatorijs, quinque illa priora
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(quoad maximam partem) ſeparatim haberi poſſunt. </
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<
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xml:space
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">Nam ſire-
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frigerato vaſe, in quo facta eſt digeſtio, effundatur vinum in cu-
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curbitas altas, quibus impoſiti ſint alembici roſtrati, rimis omni-
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bus accuratè obſtructis, per balneum Maris elicietur primùm Spi-
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ritus: </
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<
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">deinde mutato Recipiente, & </
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">vrgente calore habebitur
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Phlegma, vſque dum deueniatur ad ſimilem melli liquido craſſi-
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tiem. </
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<
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xml:space
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">Tum per Retortam, ſeruatis ignis gradibus, deſtillatæ fæ-
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ces dabunt oleum pingue. </
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<
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xml:space
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">Demum ex Capite Mortuo habebitur
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Sal aſſuſo phlegmate, digerendo, ſiltrando, & </
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<
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">coagulando. </
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<
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">Et
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obtento Sale, ſi phlegma, quod fortaſſe reſiduum fuerit in Capi-
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te Mortuo, abſtraxeris, Terra remanebit. </
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<
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xml:space
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">At Spiritum Frigidum
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exhibere ſpectabilem ſeparatum à Spiritu Calido nulla ars poteſt,
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ſiquidem Spiritus Calidus ob admiſtionem Spiritûs Frigidi cogitur
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in liquorem, alioquin in auras abiens, niſi fortè cum humore
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aqueo iungeretur, ſe oculis ſubduceret. </
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<
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xml:space
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">Cœterùm Spiritus Fri-
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gidos eſſe aliquos manifeſtum videtur, & </
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xml:space
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">quando penetrabile fri-
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gus adurit, & </
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">quando cadens aliquandiu aqua ex fontis ſiſtulâ
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ſuper phialam aquæ eiuſdem plenam eam ita refrigerat, vt multo
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frigidior ſit, quàm aqua ipſius fontis, è quo deſumpta fuit:
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</
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<
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">neque enim aqua, aut terra penetrat in corpus, quod frige-
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ſcit: </
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<
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xml:space
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">eſt igitur alia tenuior natura, quam Spiritum Frigidum
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voco.</
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">Niſi illa aquæ refrigeratio contingeret ex immiſſis per
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vaſis poros ab aquâ cadente tenuiſſimis particulis, quibus referta,
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quæ vaſe continetur, aqua vim concipit excitandi acriorem fri-
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goris ſenſum, vix intelligi poteſt, quomodo cadentis aquæ fri-
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gus, æquè lene ac remiſſum cum frigore aquæ in phialam incluſæ,
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gignere valeat qualitatem magis intenſam; </
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<
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xml:space
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">quandoquidem huiuſ-
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modi virtute prædita non eſſet illa eadem aqua quieſcens; </
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<
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enim frigefaciendi vires adderet motus ille? </
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<
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">Fatendum eſt igitur
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frigidas particulas (quibus, quia frigidæ ſunt, vltrò commoueri
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non conuenit, quemadmodum calidis) ex impetu cadentis aquæ
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ingeri in vaſis poros adeò, vt alijs atque alijs vrgentibus, </
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