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

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            <s xml:id="echoid-s1702" xml:space="preserve">
              <pb o="49" file="00055" n="55" rhead="SECONDO."/>
            traſtano parti pure eguali dell’acqua: </s>
            <s xml:id="echoid-s1703" xml:space="preserve">Onde eſſendo tutte
              <lb/>
            le coſe eguali, non vi è cagione di variatione. </s>
            <s xml:id="echoid-s1704" xml:space="preserve">Ma ſe diuerſo
              <lb/>
            è il centro di grauità da quello della figura, di modo che le
              <lb/>
            ſue parti ſiino bene di momenti eguali, ma ineguali in gran-
              <lb/>
            dezza, all’hora premendo parti eguali di momento, & </s>
            <s xml:id="echoid-s1705" xml:space="preserve">ine-
              <lb/>
            guali di mole, parti ineguali del mezzo, cioè la maggiore,
              <lb/>
            maggiore, e la minore, minore; </s>
            <s xml:id="echoid-s1706" xml:space="preserve">incontrano anco ineguali
              <lb/>
            reſiſtenze, perche più reſiſte ad eſser alzata la parte maggio-
              <lb/>
            re, che la minore, mentre ſono premute con forze eguali; </s>
            <s xml:id="echoid-s1707" xml:space="preserve">e
              <lb/>
            così ſono non vinte egualmente le loro reſiſtenze, ma prima
              <lb/>
            la minore, che la maggiore. </s>
            <s xml:id="echoid-s1708" xml:space="preserve">E da quì ne naſce il deturba men-
              <lb/>
            to del ſito parallelo, ò orizontale; </s>
            <s xml:id="echoid-s1709" xml:space="preserve">& </s>
            <s xml:id="echoid-s1710" xml:space="preserve">il riuoltarſi del formag-
              <lb/>
            gio in taglio.</s>
            <s xml:id="echoid-s1711" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1712" xml:space="preserve">_Ofred._ </s>
            <s xml:id="echoid-s1713" xml:space="preserve">Se io hò capito bene, non ſolo queſta variatione potreb-
              <lb/>
            be naſcere quando il formaggio foſse diforme, & </s>
            <s xml:id="echoid-s1714" xml:space="preserve">il mezzo
              <lb/>
            vniforme, ma anco quando il formaggio foſſe vniforme, e
              <lb/>
            il mezzo diforme.</s>
            <s xml:id="echoid-s1715" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1716" xml:space="preserve">_Matem._ </s>
            <s xml:id="echoid-s1717" xml:space="preserve">Certiſſimo che così è; </s>
            <s xml:id="echoid-s1718" xml:space="preserve">e V. </s>
            <s xml:id="echoid-s1719" xml:space="preserve">S. </s>
            <s xml:id="echoid-s1720" xml:space="preserve">intende molto bene Et
              <lb/>
            inteſo queſto non hauerà difficoltà d’intendere, che ſe ridot-
              <lb/>
            to il formaggio in taglio, e diuiſo pure in due parti da vn
              <lb/>
            piano parallelo alla baſi, che lò diuida pure per il centro di
              <lb/>
            grauità, che parimente può eſsere, che queſte parti non ſii-
              <lb/>
            no eguali di mole, benche di momento, e che perciò, per la
              <lb/>
            medema ragione, ſia turbato da quel ſito, e di nuouo ridot-
              <lb/>
            to al ſito parallelo, ò orizontale. </s>
            <s xml:id="echoid-s1721" xml:space="preserve">Benche però queſto ſia
              <lb/>
            per ſuccedere più difficilmente, & </s>
            <s xml:id="echoid-s1722" xml:space="preserve">in diſceſa più lunga, men-
              <lb/>
            tre minore è l’acqua, che viene alzata, nè n’alza vna mole
              <lb/>
            ad eſſo eguale, ſe non quando è diſceſo per il diametro della
              <lb/>
            baſe, cioè per tutta la ſua lunghazza, ò larghezza; </s>
            <s xml:id="echoid-s1723" xml:space="preserve">hauendo
              <lb/>
            alzato vna mole eguale, quando diſcende con la parte larga,
              <lb/>
            e orizontalmente, quando è ſolamente diſceſo per tutta la
              <lb/>
            ſua altezza, ò groſſezza, che nella forma dell’ordina@io for-
              <lb/>
            maggio piacentino è molto minore di quella.</s>
            <s xml:id="echoid-s1724" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1725" xml:space="preserve">_Ofred._ </s>
            <s xml:id="echoid-s1726" xml:space="preserve">Hò io inteſo tanto, che parmi anco di poter dimoſtrare
              <lb/>
            douer ſucceder queſtoeffetto anco quando il ſolido. </s>
            <s xml:id="echoid-s1727" xml:space="preserve">che di-
              <lb/>
            ſcende foſſe vniformiſſimo, per ſola cagione della figura.
              <lb/>
            </s>
            <s xml:id="echoid-s1728" xml:space="preserve">E benche poteſſi io dimoſtrar ciò in infiniti ſolidi, ſcieglierò
              <lb/>
            il Priſma retto, del quale le baſi oppoſte ſiino li </s>
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