Bošković, Ruđer Josip, Theoria philosophiae naturalis redacta ad unicam legem virium in natura existentium

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              <pb o="239" file="0291" n="291" rhead="PARS TERTIA."/>
            ne, quam multa deduci poſſint ad explicationem Naturæ per-
              <lb/>
            quam idoneis.</s>
            <s xml:space="preserve"/>
          </p>
          <p>
            <s xml:space="preserve">510. </s>
            <s xml:space="preserve">Sic etiam ex hac diffuſione ad ejuſmodi æqualitatem
              <lb/>
              <note position="right" xlink:label="note-0291-01" xlink:href="note-0291-01a" xml:space="preserve">Quæ a diffuſio-
                <lb/>
              ne ad æqualita-
                <lb/>
              tem conſequan-
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              tur potiffimum
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              reſpectu refri-
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              gerationis, &
                <lb/>
              conglaciationis.</note>
            eandem inter diverſas ejuſdem ſubſtantiæ partes, ſed admodum
              <lb/>
            diverſam inter ſubſtantias diverſas, facile intelligitur, qui fiat,
              <lb/>
            ut manus in hyeme expoſita libero aeri minus ſentiat frigoris,
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            quam ſolido cuipiam ſatis denſo corpori, quod ante ipſi aeri
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            frigido diu fuerit expoſitum, ut marmori, & </s>
            <s xml:space="preserve">inter ipſa cor-
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            pora ſolida, multo majus frigus ab altero ſentiat, quam ab al-
              <lb/>
            tero, ac ab aere humido multo plus, quam a ſicco, rapta ni-
              <lb/>
            mirum in diverſis ejuſmodi circumſtantiis eodem tempore ad-
              <lb/>
            modum diverſa copia igneæ ſubſtantiæ, quæ calorem in manu
              <lb/>
            fovebat. </s>
            <s xml:space="preserve">Atque hic quidem & </s>
            <s xml:space="preserve">analogiæ ſunt quædam cum
              <lb/>
            iis, quæ de refractione diximus: </s>
            <s xml:space="preserve">nam plerumque corpora, quæ
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            plus habent materiæ, niſi oleoſa, & </s>
            <s xml:space="preserve">ſulphoroſa ſint, majorem
              <lb/>
            habent vim refractivam, pro ratione denſitatis ſuæ, & </s>
            <s xml:space="preserve">cor-
              <lb/>
            pora itidem communiter, quo denſiora ſunt, eo citius manum
              <lb/>
            admotam calore ſpoliant, quæ idcirco ſi lineam telam libero
              <lb/>
            expoſitam aeri contingat in hyeme, multo minus frigeſcit,
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            quam ſi lignum, ſi marmora, ſi metalla. </s>
            <s xml:space="preserve">Fieri itidem poteſt,
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            ut aliqua ſubſtantia ejuſmodi ſubſtantiam igneam repellat et-
              <lb/>
            iam, ſed ob aliam ſubſtantiam admixtam ſibi magis attrahen-
              <lb/>
            tem, adhuc aliquid ſurripiat magis, vel minus, prout ejus ad-
              <lb/>
            mixtæ ſubſtantiæ plus habet, vel minus. </s>
            <s xml:space="preserve">Sic fieri poſſet, ut
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            aer ejuſmodi ſubſtantiam igneam reſpueret, ſed ob heterogenea
              <lb/>
            corpora, quæ ſuſtinet, inter quæ inprimis eſt aqua in vapores
              <lb/>
            elevata, ſurripiat nonnihil; </s>
            <s xml:space="preserve">ubi autem in ipſo volitantes par-
              <lb/>
            ticulæ, quæ ad fixitatem adducunt, vel expellunt ejuſmodi
              <lb/>
            ſubſtantiam igneam, accedant ad alias, ut aqueas, fieri poteſt,
              <lb/>
            ut repente habeantur & </s>
            <s xml:space="preserve">concretiones, atque congelationes, ac
              <lb/>
            inde nives, & </s>
            <s xml:space="preserve">grandines. </s>
            <s xml:space="preserve">A diffuſione vero ad æqualitatem
              <lb/>
            intra idem corpus fieri utique debet, ut ubi altius infra Ter-
              <lb/>
            ræ ſuperficiem deſcenſum ſit, permanens habeatur caloris
              <lb/>
            gradus, ut in fodinis, ad exiguam profunditatem pertinen-
              <lb/>
            te effectu viciſſitudinum, quas habemus in ſuperficie ex tot
              <lb/>
            ſubſtantiarum permixtionibus continuis, & </s>
            <s xml:space="preserve">acceſſu, ac receſſu
              <lb/>
            ſolarium radiorum, quæ omnia ſe mutuo compenſant ſaltem
              <lb/>
            intra annum, antequam ſenſibilis differentia haberi poſſit in
              <lb/>
            profundioribus locis: </s>
            <s xml:space="preserve">ac ex diverſa vi, quam diverſæ ſub-
              <lb/>
            ſtantiæ exercent in ejuſmodi ſubſtantiam igneam, provenire
              <lb/>
            debet & </s>
            <s xml:space="preserve">illud, quod experimenta evincunt, ut nimirum nec
              <lb/>
            eodem tempore æque frigeſcant diverſæ ſubſtantiæ aeri libe-
              <lb/>
            ro expoſitæ, nec caloris imminutio certam denſitatum ra-
              <lb/>
            tionem ſectetur, ſed varietur admodum independenter ab i-
              <lb/>
            pſa. </s>
            <s xml:space="preserve">Eodem autem pacto & </s>
            <s xml:space="preserve">alia innumera ex iiſdem prin-
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            cipiis, ubique ſane conformibus admodum facile explican-
              <lb/>
            tur.</s>
            <s xml:space="preserve"/>
          </p>
          <p>
            <s xml:space="preserve">511. </s>
            <s xml:space="preserve">Patet autem ex iiſdem principiis repeti poſſe explica-
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              <note position="right" xlink:label="note-0291-02" xlink:href="note-0291-02a" xml:space="preserve">Eodem pa.</note>
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