Zanotti, Francesco Maria, Della forza de' corpi che chiamano viva libri tre, 1752

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            <s xml:id="echoid-s2677" xml:space="preserve">
              <pb o="190" file="0214" n="214" rhead="DELLA FORZA DE’ CORPI"/>
            di Euclide; </s>
            <s xml:id="echoid-s2678" xml:space="preserve">è però vera, ne vuol negarſi; </s>
            <s xml:id="echoid-s2679" xml:space="preserve">percioc-
              <lb/>
            chè egli è pure ſecondo la conſuetudine della natu-
              <lb/>
            ra, che niuna forza ſi eſtingua e periſca mai ſe non
              <lb/>
            operando, e faccendo alcun’ effetto; </s>
            <s xml:id="echoid-s2680" xml:space="preserve">la qual con-
              <lb/>
            ſuetudine io potrei dimoſtrarvi con innumerabili
              <lb/>
            eſempli, ſe ſi poteſſer qui ora ſcorrere tutte le
              <lb/>
            parti sì della fiſica come della meccanica. </s>
            <s xml:id="echoid-s2681" xml:space="preserve">E voi
              <lb/>
            ſapete, che alle conſuetudini della natura vuolſi
              <lb/>
            aver riguardo. </s>
            <s xml:id="echoid-s2682" xml:space="preserve">Si veramente, riſpoſi; </s>
            <s xml:id="echoid-s2683" xml:space="preserve">e per que-
              <lb/>
            ſto riguardo io non voglio già, che i Leibnizia-
              <lb/>
            ni dicano eſsere alcun corpo nel mondo, in cui
              <lb/>
            periſca la forza viva ſenza operar nulla; </s>
            <s xml:id="echoid-s2684" xml:space="preserve">io gli
              <lb/>
            pregava ſolamente a voler dire, che la forza vi-
              <lb/>
            va potrebbe perire ſenza operar nulla, ſe foſse-
              <lb/>
            ro al mondo de’ corpi duriſſimi, i quali però non
              <lb/>
            vi ſono. </s>
            <s xml:id="echoid-s2685" xml:space="preserve">Nel che niente ſi offende la conſuetudine
              <lb/>
            della natura, la qual vuol eſsere oſservata ne cor-
              <lb/>
            pi, che ſono, e non in quei, che non ſono. </s>
            <s xml:id="echoid-s2686" xml:space="preserve">Sicco-
              <lb/>
            me la conſuetudine, che hanno tutti i corpi, come
              <lb/>
            ſon poſti in libertà, di cadere, niente ſi offenderebbe
              <lb/>
            ſupponendo un corpo non grave, il qual per ciò
              <lb/>
            non cadeſſe; </s>
            <s xml:id="echoid-s2687" xml:space="preserve">perciocchè quella conſuetudine è
              <lb/>
            ne corpi per queſto appunto perchè ſon gravi;
              <lb/>
            </s>
            <s xml:id="echoid-s2688" xml:space="preserve">così quella conſuetudine, che ogni forza ſi eſtin-
              <lb/>
            gua faccendo alcun effetto, è forſe nella natura,
              <lb/>
            perchè non ſono nella natura corpi duriſſimi, i
              <lb/>
            quali ſe vi foſſero, quella conſuetudine non ſa-
              <lb/>
            rebbe. </s>
            <s xml:id="echoid-s2689" xml:space="preserve">Voi dite beniſſimo, diſſe allora il Signor
              <lb/>
            D. </s>
            <s xml:id="echoid-s2690" xml:space="preserve">Nicola, che le conſuetudini della natura deb-
              <lb/>
            bono oſſervarſi nè corpi, che ſono, non in </s>
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