Casati, Paolo, De igne dissertationes physicae, 1686

Table of Notes

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            <s xml:id="echoid-s2137" xml:space="preserve">
              <pb o="66" file="0078" n="78" rhead="Diſſertatio Tertia."/>
            maior: </s>
            <s xml:id="echoid-s2138" xml:space="preserve">non quia aliquid graue additum illi fuerit, ſed quia ali-
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            quid leue, videlicet lignum, demptum eſt, quod ſuâ leuitate
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            in aquâ deterebat ferri grauitatem, quamuis in aëre facta ſit mi-
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            nor grauitas dempto ligno, quod pariter in aëre eſt graue. </s>
            <s xml:id="echoid-s2139" xml:space="preserve">Quid
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            ni, inquam, ſimile aliquid in allatis experimentis contingat? </s>
            <s xml:id="echoid-s2140" xml:space="preserve">Cum
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            primùm ex venâ metallum ſeiunctum fuit, & </s>
            <s xml:id="echoid-s2141" xml:space="preserve">ope ignis ſolutum in
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            maſſam frigore coaluit, intra poros plurimas ignis permiſti parti-
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            culas concluſit, quas ſi dixerimus aëre leuiores, vtique metalli
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            grauitatem imminuunt. </s>
            <s xml:id="echoid-s2142" xml:space="preserve">Iam verò ſi metallum igni iterum expo-
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            natur, in eòque diutiùs ad aliquot horas detineatur, vi caloris ita
              <lb/>
            recludi poſſunt intimi meatus, vt leuiſſimæ particulæ ibi iam du-
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            dum concluſæ, & </s>
            <s xml:id="echoid-s2143" xml:space="preserve">raritatem maiorem affectantes, tandem auolare
              <lb/>
            valeant, fiatque metalli maior ſecundùm ſpeciem grauitas, non
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            quia graues aliquæ ignis particulæ additæ fuerint, ſed quia metal-
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            lum particulas aëre leuiores amiſerit.</s>
            <s xml:id="echoid-s2144" xml:space="preserve"/>
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            <s xml:id="echoid-s2145" xml:space="preserve">Maur. </s>
            <s xml:id="echoid-s2146" xml:space="preserve">Ingeniosè excogitatum: </s>
            <s xml:id="echoid-s2147" xml:space="preserve">an veritas prorſus congruat,
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            non ſatis ſcio. </s>
            <s xml:id="echoid-s2148" xml:space="preserve">Si ex caloris vehementiâ metallicarum laminarum,
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            aut ſcobis, aut calcis meatus recluduntur, & </s>
            <s xml:id="echoid-s2149" xml:space="preserve">ignei ſpiritus, quos,
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            ſi cum aëre comparentur, leues dicis, indè auolant, quid in eo-
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            rum locum ſuccedit? </s>
            <s xml:id="echoid-s2150" xml:space="preserve">Nonne ſimiles igniculi? </s>
            <s xml:id="echoid-s2151" xml:space="preserve">& </s>
            <s xml:id="echoid-s2152" xml:space="preserve">quidem maiore
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            copiâ pro meatuum amplitudine maiore; </s>
            <s xml:id="echoid-s2153" xml:space="preserve">qui propterea, ſi aëre
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            leuiores eſſent, multo magis metalli grauitatem imminuerent,
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            quam tamen auctam obſeruamus. </s>
            <s xml:id="echoid-s2154" xml:space="preserve">Neque poſſumus igniculos om-
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            nes extrudere, vt prorſus aër poros illos impleat; </s>
            <s xml:id="echoid-s2155" xml:space="preserve">quandoquidem
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            adhuc feruens materia bilancis examini ſubiecta eſt. </s>
            <s xml:id="echoid-s2156" xml:space="preserve">Fatendum
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            igitur igniculos in materiam metallicam irruentes (ſimile ponderis
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            augmentum deprehenſum eſt in Coralij rubri fragminulis in vitreâ
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            phialâ hermetico ſigillo obſtructâ clauſis, ſuper accenſos carbo-
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            nes, ne vitrum labem faceret, per interualla collocatis) dum
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            alij ab alijs vrgentur, ita demum intrà poros conſtipari, & </s>
            <s xml:id="echoid-s2157" xml:space="preserve">cum
              <lb/>
            alijs particulis complicari, vt pro ſuâ mobilitate auolare ne-
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            queant; </s>
            <s xml:id="echoid-s2158" xml:space="preserve">id quod aliquam temporis diuturnitatem exigit, vt expe-
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            riendo didicimus.</s>
            <s xml:id="echoid-s2159" xml:space="preserve"/>
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            <s xml:id="echoid-s2160" xml:space="preserve">Vt autem, quod res eſt, ſincerè eloquar, diſſimulandum non
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            videtur, quid tandem ex huiuſcemodi experimentis in rem no-
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            ſtram confici queat. </s>
            <s xml:id="echoid-s2161" xml:space="preserve">Et primum quidem ex poſtremo, quod Boy-
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            le attulit *de Penetrabilitate vitri,* experimento habemus plum-
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            bi v@@iam in vitreâ retortâ hermeticè ſigillatâ poſt duas </s>
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