Angeli, Stefano degli, Della gravita' dell' aria e fluidi : esercitata principalmente nelli loro homogenei

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          <p>
            <s xml:id="echoid-s2573" xml:space="preserve">_Ofred._ </s>
            <s xml:id="echoid-s2574" xml:space="preserve">Crede V. </s>
            <s xml:id="echoid-s2575" xml:space="preserve">S. </s>
            <s xml:id="echoid-s2576" xml:space="preserve">che anco queſte ragioni ſi poſſino aſſegna re
              <lb/>
            al moto dell’argento viuo nella fiſtola?</s>
            <s xml:id="echoid-s2577" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2578" xml:space="preserve">_Matem._ </s>
            <s xml:id="echoid-s2579" xml:space="preserve">Aſſai più efficacemente. </s>
            <s xml:id="echoid-s2580" xml:space="preserve">E primieramente, ha mai oſſer-
              <lb/>
            uato Sig. </s>
            <s xml:id="echoid-s2581" xml:space="preserve">Ofredi, quando uno con tirare rompe vna fune, ò
              <lb/>
            coſa ſimile, l’effetto che fà la parte che li reſta in mano?</s>
            <s xml:id="echoid-s2582" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2583" xml:space="preserve">_Ofred._ </s>
            <s xml:id="echoid-s2584" xml:space="preserve">L’hò oſſeruato hieri con mio danno, che volendo accor-
              <lb/>
            dar vn Liuto, e tirando troppo, fi ſpezzò la corda, e la parte
              <lb/>
            che reſtò auolta al pirone mi colſe nel volto vicino ad vn
              <lb/>
            occhio, che quaſi m’hebbe ad acciecare.</s>
            <s xml:id="echoid-s2585" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2586" xml:space="preserve">_Matem._ </s>
            <s xml:id="echoid-s2587" xml:space="preserve">Pouero Sig. </s>
            <s xml:id="echoid-s2588" xml:space="preserve">Ofredi, ſe oltre alla curta viſta, che hà, de-
              <lb/>
            uentaua anco ciecolino. </s>
            <s xml:id="echoid-s2589" xml:space="preserve">Noti adunque, che nel ſepararſi vna
              <lb/>
            parte dall’altra, quella che reſta in mano sbalza verſo quel-
              <lb/>
            lo, che tira. </s>
            <s xml:id="echoid-s2590" xml:space="preserve">Tanto nell alzar con violenza la canna, non ſi fa
              <lb/>
            queſto ſtrapamento dell’argento viuo, che reſta nella can-
              <lb/>
            na, da quello, che reſta nel vaſo? </s>
            <s xml:id="echoid-s2591" xml:space="preserve">Ecco adunque, che vi è
              <lb/>
            qualche cagione di principio di moto verſo la ſtrada, che fà
              <lb/>
            la mano alzante. </s>
            <s xml:id="echoid-s2592" xml:space="preserve">Per ſecondo, come nel mio cannone, coſi
              <lb/>
            in queſta canna ſi conferiſce in queſto veloce alzamento al-
              <lb/>
            l’argento viuo quell’empito; </s>
            <s xml:id="echoid-s2593" xml:space="preserve">& </s>
            <s xml:id="echoid-s2594" xml:space="preserve">eſsendo queſti corpo conti-
              <lb/>
            guo alla canna, per il fermar di queſta non languiſce
              <lb/>
            ſubito quell’empito, ma continuando per qualche tem-
              <lb/>
            po, continuerà anco il moto all’insù verſo la cima della
              <lb/>
            canna.</s>
            <s xml:id="echoid-s2595" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2596" xml:space="preserve">S’aggiunga per terzo, che ſicome il mezzo è d’impedimento
              <lb/>
            alle coſe, che per eſſo ſi muouono, e ſempre più, quāto è più
              <lb/>
            craſſo, e denſo; </s>
            <s xml:id="echoid-s2597" xml:space="preserve">coſi alla ſalita dell’argento viuo ſpiana la
              <lb/>
            ſtrada mirabilmente il vano, che reſta nella ſommità della fi-
              <lb/>
            ſtola per cui deue ſalire. </s>
            <s xml:id="echoid-s2598" xml:space="preserve">Il quale eſſendo ò vacuo, ò almeno
              <lb/>
            materia ſottiliſſima, laſcia che con tanto maggior empito
              <lb/>
            ſaliſca l’argento viuo.</s>
            <s xml:id="echoid-s2599" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2600" xml:space="preserve">Che s’aggiongeremo per vltimo, che chi alza la canna con
              <lb/>
            preſtezza, nel fine l’abbaſſi anco qualche poco, tanto più ve
              <lb/>
            locemente ſalirà l’argento viuo.</s>
            <s xml:id="echoid-s2601" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2602" xml:space="preserve">_Ofred._ </s>
            <s xml:id="echoid-s2603" xml:space="preserve">Realmente parmi, che queſte cagioni debbano interue-
              <lb/>
            nire nella ſalita di queſto argento viuo; </s>
            <s xml:id="echoid-s2604" xml:space="preserve">onde io reſto perſua-
              <lb/>
            ſo a confeſsare, che la preſſione dell’aria in queſto caſo, ò
              <lb/>
            non vi concorra, ò almeno ſolamente come cauſa partia-
              <lb/>
            le, Ma prouo bene, che la preſſione dell’ aria fa vn’ </s>
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