Casati, Paolo, De igne dissertationes physicae, 1686

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              <pb o="242" file="0254" n="254" rhead="Diſſertatio Octaua."/>
            tandem aut exhauriatur, aut euaneſcat corpus, quod fuit in-
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            flammatum.</s>
            <s xml:id="echoid-s7388" xml:space="preserve"/>
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            <s xml:id="echoid-s7389" xml:space="preserve">Maur. </s>
            <s xml:id="echoid-s7390" xml:space="preserve">Non eſt nobis peculiaris hæc difficultas: </s>
            <s xml:id="echoid-s7391" xml:space="preserve">etiamſi enim
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            materiam accenſam mutari in ignem, factâ illâ, quam communi-
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            ter Peripateticæ Scholæ adſtruunt, ſubſtantiali conuerſione,
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            quis dixerit, nemo tamen dubitat, an ea conſumatur, ſi igneſcat:
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            </s>
            <s xml:id="echoid-s7392" xml:space="preserve">quomodo igitur perpetuam lucernæ flammam ſubminiſtrare po-
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            terit?</s>
            <s xml:id="echoid-s7393" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s7394" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s7395" xml:space="preserve">Poſſe carbones igneſcere, nec tamen conſumi, aliqui
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            putant: </s>
            <s xml:id="echoid-s7396" xml:space="preserve">iubent ollam fictilem ſatis validam, vt ignem ferre poſſit,
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            impleri extinctis carbonibus, tum impoſito operculo rimas omnes
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            luto obſtrui: </s>
            <s xml:id="echoid-s7397" xml:space="preserve">Exſiccato luto imponatur olla fornaci, atque igne
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            circulari tota igneſcat. </s>
            <s xml:id="echoid-s7398" xml:space="preserve">Carbones fuiſſe accenſos conſtabit, ſi ol-
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            lam à fornace extractam frangas, omnes enim apparebunt igniti; </s>
            <s xml:id="echoid-s7399" xml:space="preserve">at
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            carbones non conſumi affirmabis, ſi ollam ſimilem carbonibus
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            plenam & </s>
            <s xml:id="echoid-s7400" xml:space="preserve">ignitam permittas ſponte ſuâ refrigeſcere; </s>
            <s xml:id="echoid-s7401" xml:space="preserve">vbi enim
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            frigidæ ollæ operculum detraxeris, integros carbones depre-
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            hendes.</s>
            <s xml:id="echoid-s7402" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s7403" xml:space="preserve">Maur. </s>
            <s xml:id="echoid-s7404" xml:space="preserve">An ſint carbones accenſi, quandiu integra & </s>
            <s xml:id="echoid-s7405" xml:space="preserve">clauſa
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            manet olla, ſi dubitare velim, quis prohibet? </s>
            <s xml:id="echoid-s7406" xml:space="preserve">Non nego pluri-
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            mos igniculos per ollæ meatus intruſos ſe inſinuaſſe in carbonum
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            extimam ſuperficiem aëre excluſo, qui propterea in anguſtiorem
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            locum per vim coactus aptus eſſet ſuâ virtute elaſticâ vas diffrin-
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            gere, niſi ſatis validum eſſet. </s>
            <s xml:id="echoid-s7407" xml:space="preserve">Ob illas tamen anguſtias agitari non
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            poſſunt immiſſi igniculi, neque ſulphureæ carbonum particulæ;
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            </s>
            <s xml:id="echoid-s7408" xml:space="preserve">ideò nulla fit, ſaltem notabilis, accenſio, neque partium diſſolu-
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            tio: </s>
            <s xml:id="echoid-s7409" xml:space="preserve">cumque per exemptæ è fornace ollæ meatus eoſdem, per quos
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            ingreſſi fuerant igniculi, iterum exiliant, & </s>
            <s xml:id="echoid-s7410" xml:space="preserve">refrigeſcente ollâ ſen-
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            ſim incluſus aër qui fuerat conſtipatus, dilatetur, neque permit-
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            tat ſulphurearum particularum agitationem; </s>
            <s xml:id="echoid-s7411" xml:space="preserve">propterea in frigidâ
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            ollâ, qui nunquam fuere accenſi, integri carbones reperiuntur. </s>
            <s xml:id="echoid-s7412" xml:space="preserve">
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            At, inquiet aliquis, fractâ ollâ ignitâ carbones omnes videntur
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            accenſi. </s>
            <s xml:id="echoid-s7413" xml:space="preserve">Ita planè ſed momento eodem, quo, egrediente aëre,
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            datur igniculis immiſſis ſpatium ſe agitandi, agitantur pariter
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            Sulphureæ carbonum particulæ, & </s>
            <s xml:id="echoid-s7414" xml:space="preserve">prunæ fiunt: </s>
            <s xml:id="echoid-s7415" xml:space="preserve">quemadmodum
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            enim non rarò contingit ignem in loco clauſo contineri ſinè flam-
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            mâ, & </s>
            <s xml:id="echoid-s7416" xml:space="preserve">vbi primùm exitus aliquis aperitur, illico flamma erum-
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            pit; </s>
            <s xml:id="echoid-s7417" xml:space="preserve">ita fieri poteſt, vt carbonum pori pleni ſint immiſſis </s>
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