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

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          <pb o="17" file="00023" n="23" rhead="PRIMO."/>
          <p>
            <s xml:id="echoid-s572" xml:space="preserve">_Matem_. </s>
            <s xml:id="echoid-s573" xml:space="preserve">Io non voglio inueſtigarein che ſenſo habbia parlato
              <lb/>
            ilP. </s>
            <s xml:id="echoid-s574" xml:space="preserve">Fabri. </s>
            <s xml:id="echoid-s575" xml:space="preserve">Sò bene, che hauendo io immerſo più volte, ebic-
              <lb/>
            chieri, e altri vaſi, non hò eſperimentato dopò la total im-
              <lb/>
            merſione, maggiori conati a riſalire, ma bene mi ſono par-
              <lb/>
            ſi minori, ſe bene molto poco, perche molto poco, in poca
              <lb/>
            diſceſa, e in vaſi piccioli, in poca quantità, l’aria ſi conſtipa;
              <lb/>
            </s>
            <s xml:id="echoid-s576" xml:space="preserve">e poca è l’acqua che entra nel vaſo. </s>
            <s xml:id="echoid-s577" xml:space="preserve">Ma però chi diligente-
              <lb/>
            mente tentara queſt’ eſperienza, ſi potrà render certo di
              <lb/>
            queſta curioſità.</s>
            <s xml:id="echoid-s578" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s579" xml:space="preserve">Prenda ſi vn vaſo grande di vetro, piombo ò altra materia, & </s>
            <s xml:id="echoid-s580" xml:space="preserve">
              <lb/>
            acciò diſcenda, ſe gl’attacchi dalla parte della bocca peſo a
              <lb/>
            ſufficienza, e dalla parte di ſopra ſi leghi con funicella fatta
              <lb/>
            diſetole di cauallo, le quali per eſſer ordinariamente della
              <lb/>
            medema grauità in ſpecie in circa con l’acqua comune,
              <lb/>
            s’adoprano comunemente da quelli, che peſano le coſe
              <lb/>
            graui nell’acqua, perche quella quantità d’eſſe, che ſe im-
              <lb/>
            merge, non altera la grauità della coſa peſata; </s>
            <s xml:id="echoid-s581" xml:space="preserve">poi ſe fa-
              <lb/>
            cia diſcendere con la bocca all’ingiù in vn’ acqua aſſai pro-
              <lb/>
            fonda, come ſarebbe in vn pozzo, ſino che ſia totalmente
              <lb/>
            immerſo, Fatto queſto s’attacchi ad vna ſtadera, ò bilan-
              <lb/>
            cia, come ſi ſuol fare, e ſi noti il ſuo peſo, che ſarà quanto
              <lb/>
            importa tutto il vaſo con l’aria, pcſi attaccati, e funicella,
              <lb/>
            che ſarà ſopra I’acqua, hauendo anco riguardo alla differen-
              <lb/>
            za, che poteſſe cagionare la parte della funicella, che s’im-
              <lb/>
            mergeſſe, quando queſta non foſſe preciſamente della me-
              <lb/>
            dema grauità ſpecifica dell’acqua. </s>
            <s xml:id="echoid-s582" xml:space="preserve">Fatto queſto peſo, ſi laſci
              <lb/>
            diſcendere il vaſo più, e più nell’acqua quanto ſi vuole; </s>
            <s xml:id="echoid-s583" xml:space="preserve">poi-
              <lb/>
            che ſe ſaranno certe le noſtre dottrine, quanto più ſarà di-
              <lb/>
            ſceſo nell’acqua, ſe ſi ripeſarà con li predetti riguardi, e cau-
              <lb/>
            tele, ſempre più ſi trouarà maggior peſo. </s>
            <s xml:id="echoid-s584" xml:space="preserve">Perche entrando
              <lb/>
            nel vaſo maggior quantità d’ acqua, quanto più il vaſo di-
              <lb/>
            ſcende, queſta li farà anco acquiſtar maggior momento. </s>
            <s xml:id="echoid-s585" xml:space="preserve">Se
              <lb/>
            adunque più profondato il vaſo ha ſempre maggior mo-
              <lb/>
            mento, chi in quel luogo li leuaſſe li peſi attaccati, mentre
              <lb/>
            queſti in tutti li luoghi hanno nell’acqua il medemo mo-
              <lb/>
            mento, reſtarebbe il vaſo con l’aria con maggior momento.
              <lb/>
            </s>
            <s xml:id="echoid-s586" xml:space="preserve">Onde ch@lo teneſſe acciò non riſaliſce ſpinto insu dall’ac-
              <lb/>
            qua, farebbe minor fatica; </s>
            <s xml:id="echoid-s587" xml:space="preserve">c tanto più minore, quanto </s>
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    </echo>
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