Casati, Paolo
,
De igne dissertationes physicae
,
1686
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Diſſertatio Quarta.
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mam agnoſcens, hanc in candente ferro non deprehendat? </
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<
s
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xml:space
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">cui ſi
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fortè lux inſit remiſſior, certè nec calor hebetior, nec vis vren-
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di languidior. </
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<
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xml:space
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">At ferri naturam non perire, clarius eſt, quàm vt
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à quoquam negari queat. </
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<
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xml:space
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">Aut igitur duæ formæ, quarum alte-
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ra alteri ſubiecta non eſt, materiam eandem pariter imbuunt, id
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quod Peripatetica Philoſophia auerſatur; </
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<
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xml:id
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xml:space
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">aut, ſi nouam formam
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ſubſtantialem infert ignis, ferro candenti ignem ineſſe pertinaciter
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inſiciandum eſt cum aliquibus, quos aliquando diſputantes audi-
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ui, qui ſenſibus omnibus fruſtra reclamantibus malebant præpo-
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ſterè philoſophari, ne Metaphyſicæ quædam, vt aiunt (à vero
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potiùs abſtractæ) eorum ratiocinationes perirent. </
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<
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xml:space
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">Si igitur igne-
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ſcere nil aliud fuerit, quàm eximium calorem cum virtute com-
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burendi coniunctum concipere, poterit ferrum citrà ſuæ naturæ
<
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mutationem, aut nouæ formę ſubſtantialis additamentum,
<
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virtutem hanc acquirere, qua nihil diſtare videatur ab
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igne.</
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">Melioris notæ Philoſophis, ne duabus Formis Mate-
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riam vnam ſubijciant, placet in hiantes ferri poros particulas igneas
<
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inſeri (quemadmodum humidâ tempeſtate ligna aliqua ita vapo-
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ribus imbuuntur, vt eorum moles aucta videatur) quarum nati-
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uo lumine inuoluta ferri obſcuritas lateat, igniſque tantummo-
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do lucida ſpecies exhibeatur. </
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<
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xml:space
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">Verùm vt vt lux ignea ferro accidit,
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vis certè vrendi maior apparet, quàm quæ tenuiſſimis igniculis
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per hiantes poros diſtributis tribui valeat; </
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<
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xml:space
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">quippe qui, licèt mul-
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to plures, in ardente carbone vim eam languidiùs exercebant: </
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quo non obſcurè intelligitur ipſis quoquè ferri particulis igneam
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adurendi virtutem ineſſe. </
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>
<
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xml:space
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">Neque nodum hunc continuò expe-
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diunt, qui ferri particulas aliquas in ignem contumaces diſtin-
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guunt ab alijs faciliùs concipientibus ignem, à quo abſumantur
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(vt ſatis dilucidè indicant ſtricturæ ex feruenti maſſâ erumpentes,
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ſiuè dum in fornace excoquitur, ſiue dum malleis ſuper incudem
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tunditur) his verò igneam naturam conſecutis acerrimam illam
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vrendi vim concedunt, ob maiorem nimirum, quàm in carbone,
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ſubiectæ materiæ denſitatem. </
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">Quid enim, ſi defæcatus chalybs,
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vel puriſſimum aurum incandeſcat? </
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xml:space
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">aut perpaucæ, aut omnino
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nullę ſunt particulæ, quarum natura mutationem ſubeat, corru-
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ptàque Metalli formâ prorſus igneſcat; </
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<
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xml:space
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">tota tamen candens maſ-
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ſa nec exiguam pro ignitarum particularum portione </
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