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

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            <s xml:space="preserve">
              <pb o="211" file="0263" n="263" rhead="PARS TERTIA."/>
            tur; </s>
            <s xml:space="preserve">tum vero repulſiva vis particularum prioris ſubſtantiæ re-
              <lb/>
            viviſcit quodammodo, & </s>
            <s xml:space="preserve">agit, ac ipſa ſubſtantia evadit vola-
              <lb/>
            tilis, quæ iterum nova earundem pá
              <unsure/>
            rticularum intruſione figi-
              <lb/>
            tur. </s>
            <s xml:space="preserve">Id ſane videtur accidere in aere, qui poteſt ad fixum re-
              <lb/>
            digi corpus, & </s>
            <s xml:space="preserve">Haleſius demonſtravit per experimenta, par-
              <lb/>
            tem ingentem lapidum, qui in veſica oriuntur, & </s>
            <s xml:space="preserve">calculorum
              <lb/>
            in renibus, conſtare puro aere ad fixitatem reducto, qui dein-
              <lb/>
            de poteſt iterum ſtatum volatilem recuperare: </s>
            <s xml:space="preserve">ac halitus inpri-
              <lb/>
            mis ſulphurei, & </s>
            <s xml:space="preserve">ipſa reſpiratio animalium ingentem aeris co-
              <lb/>
            piam transſert a ſtatu volatili ad fixum. </s>
            <s xml:space="preserve">Ibi non habetur ae-
              <lb/>
            ris compreſſio ſola facta per cellularum parietes ipſum conclu-
              <lb/>
            dentes; </s>
            <s xml:space="preserve">ii enim diſrumperentur penitus, cum aer in ejuſmodi
              <lb/>
            fixis corporibus reducatur ad molem etiam millecuplo mino-
              <lb/>
            rem, in quo ſtatu, ſi integras haberet elaſticas vires, omnia
              <lb/>
            ſane repagula illa diffringeret. </s>
            <s xml:space="preserve">Haleſius putat, eum in illo ſta-
              <lb/>
            tu amittere elaſticitatem ſuam, quod fieret utique, ſi particu-
              <lb/>
            læ ipſius ad eam inter ſe diſtantiam devenirent, in qua jam
              <lb/>
            vis repulſiva nulla ſit, ſed potius attractiva ſuccedat: </s>
            <s xml:space="preserve">ſed fieri
              <lb/>
            itidem poteſt, ut vim quidem repulſivam adhuc ingentem ha-
              <lb/>
            beant illæ particulæ, ſed ab interpoſita ſulphurei halitus parti-
              <lb/>
            cula attrahantur magis, ut paullo ante vidimus in elaſtris a
              <lb/>
            globulo magnetico cohibitis, & </s>
            <s xml:space="preserve">conſtrictis. </s>
            <s xml:space="preserve">Tum quidem ela-
              <lb/>
            ſticitas in aere ad fixitatem redacto maneret tota, ſed ejus ef-
              <lb/>
            fectus impediretur a prævalente vi. </s>
            <s xml:space="preserve">Atque id quidem animad-
              <lb/>
            verti, & </s>
            <s xml:space="preserve">monui ante aliquot annos in diſſertatione De Turbi-
              <lb/>
            ne, in qua omnia turbinis ipſius phænomena ab hac aeris fixa-
              <lb/>
            tione repetii.</s>
            <s xml:space="preserve"/>
          </p>
          <p>
            <s xml:space="preserve">459. </s>
            <s xml:space="preserve">Porro agitatio illa particularum in igne, ac in fermen-
              <lb/>
              <note position="right" xlink:label="note-0263-01" xlink:href="note-0263-01a" xml:space="preserve">Cauſa agitatio-
                <lb/>
              nis particula-
                <lb/>
              rum in igne,
                <lb/>
              fermentationi-
                <lb/>
              bus, efferve-
                <lb/>
              ſcentiis repeti-
                <lb/>
              ta a contorſio-
                <lb/>
              ne curvæ circa
                <lb/>
              axem.</note>
            tationibus, & </s>
            <s xml:space="preserve">efferveſcentiis, unde oriatur, facile itidem eſt
              <lb/>
            in mea theoria exponere. </s>
            <s xml:space="preserve">Ut primum crus meæ curvæ mihi
              <lb/>
            impenetrabilitatem exhibuit, poſtremum gravitatem, interſe-
              <lb/>
            ctiones autem varia cohæſionum genera; </s>
            <s xml:space="preserve">ita alternatio arcuum
              <lb/>
            jam repulſivorum, jam attractivorum, fermentationes exhibet,
              <lb/>
            & </s>
            <s xml:space="preserve">evaporationes variorum generum, ac ſubitas etiam deflagra-
              <lb/>
            tiones, & </s>
            <s xml:space="preserve">exploſiones, illas, quæ occurrunt in Chemia paſ-
              <lb/>
            ſim, & </s>
            <s xml:space="preserve">quam in pulvere pyrio quotidie intuemur. </s>
            <s xml:space="preserve">Quæ au-
              <lb/>
            tem huc ex Mechanica pertinent, jam vidimus num. </s>
            <s xml:space="preserve">199.
              <lb/>
            </s>
            <s xml:space="preserve">Dum ad ſe invicem accedunt puncta cum velocitate aliqua,
              <lb/>
            ſub omni arcu attractivo velocitatem augent, ſub omni re-
              <lb/>
            pulſivo minuunt: </s>
            <s xml:space="preserve">contra vero dum a ſe invicem recedunt, ſub
              <lb/>
            omni repulſivo augent, ſub omni attractivo minuunt, donec
              <lb/>
            in acceſſu inveniant arcum repulſivum, vel in receſſu attracti-
              <lb/>
            vum ſatis validum ad omnem velocitatem extinguendam. </s>
            <s xml:space="preserve">Ubi
              <lb/>
            eum invenerint, retro curſum reflectunt, & </s>
            <s xml:space="preserve">oſcillant hinc, & </s>
            <s xml:space="preserve">
              <lb/>
            inde, in quo itu, & </s>
            <s xml:space="preserve">reditu perturbato, ac celeri, fermenta-
              <lb/>
            tionis habemus ideam ſatis diſtinctam.</s>
            <s xml:space="preserve"/>
          </p>
          <p>
            <s xml:space="preserve">460. </s>
            <s xml:space="preserve">Et in acceſſu quidem ſemper devenitur ad arcum re-
              <lb/>
              <note position="right" xlink:label="note-0263-02" xlink:href="note-0263-02a" xml:space="preserve">Ofcillationes in
                <lb/>
              acceſſu ſemper</note>
            pulſivum aliquem parem extinguendæ velocitati cuilibet </s>
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