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

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            <s xml:id="echoid-s3560" xml:space="preserve">
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            ceſſo, quando l’acqua haueſſe patito qualche compreſsio-
              <lb/>
            ne.</s>
            <s xml:id="echoid-s3561" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3562" xml:space="preserve">_Cont_. </s>
            <s xml:id="echoid-s3563" xml:space="preserve">Certo, che mentre la sfera è dimoſtrata dalli Geometri
              <lb/>
            più capace di tutti li corpi iſoperimetri, cioè del medemo
              <lb/>
            ambito, quando per l’am maccatura l’argento non ſi eſten-
              <lb/>
            deſſe, & </s>
            <s xml:id="echoid-s3564" xml:space="preserve">aſſottigliaſſe, biſognerà confeſſare che la palla
              <lb/>
            ammaccata facendoſi meno capace, l’acqua ſi riſtringeſſe,
              <lb/>
            quando che non vſciſſe.</s>
            <s xml:id="echoid-s3565" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3566" xml:space="preserve">_Mat_. </s>
            <s xml:id="echoid-s3567" xml:space="preserve">Hanno fatto la palla d’argento, perche, dicono eſsi, che
              <lb/>
            _queſto per la ſua crudezza non cõporta d’aſſottigliarſi, e diſtenderſi_
              <lb/>
            _come farebbe l’oro raffinato, òil piombo ò altro metallo più dolce._</s>
            <s xml:id="echoid-s3568" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3569" xml:space="preserve">_@ont_. </s>
            <s xml:id="echoid-s3570" xml:space="preserve">Deuono intender che l’argento non s’aſſottigli coſi
              <lb/>
            prontamente quanto li predetti metalli, e non aſſoluta-
              <lb/>
            mente, perche pur eſſo ſi rende alle martellate.</s>
            <s xml:id="echoid-s3571" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3572" xml:space="preserve">_Mat_. </s>
            <s xml:id="echoid-s3573" xml:space="preserve">Intorno a queſt’eſperienza ſi può conſiderare, che ſe be-
              <lb/>
            ne è vero, che l’acqua patiſca qualche compreſsione, nul-
              <lb/>
            ladimeno che fà tutti li sforzi per sfuggirla;</s>
            <s xml:id="echoid-s3574" xml:space="preserve">e perciò ritro-
              <lb/>
            uando la ſtrada più facile, cioè li pori del metallo, traſuda
              <lb/>
            per eſsi. </s>
            <s xml:id="echoid-s3575" xml:space="preserve">Se prenderemo paſta, creta, e ſimile materie, e le
              <lb/>
            comprimeremo con le mani, e procureremo ſtringerle trà
              <lb/>
            eſſe, più toſto che riſtringerſi vſciranno per le ſiſſure delli
              <lb/>
            diti, ma ſe non potranno vſcire, biſognerà che cedino alla
              <lb/>
            compreſsione. </s>
            <s xml:id="echoid-s3576" xml:space="preserve">Aggiuta anco la traſudatione per li pori, e
              <lb/>
            la ſottigliezza dell’argento, e la ſomma conſtipatione del-
              <lb/>
            l’acqua cagionata dal freddo del ghiaccio;</s>
            <s xml:id="echoid-s3577" xml:space="preserve">la quale renden-
              <lb/>
            dola tanto più contumace al maggiore riſtrengimento, è
              <lb/>
            cauſa che facia maggior forza per entrar nelli pori.</s>
            <s xml:id="echoid-s3578" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3579" xml:space="preserve">@@i più, mi ſarei volentieri ritrouato preſente à queſt’eſpe-
              <lb/>
            rienza, per notare ſe ad ogni ammaccatura l’ acqua traſu-
              <lb/>
            daua tutta in vna volta, & </s>
            <s xml:id="echoid-s3580" xml:space="preserve">in vn inſtante ò pure ſucceſsiua-
              <lb/>
            mente, & </s>
            <s xml:id="echoid-s3581" xml:space="preserve">in tempo. </s>
            <s xml:id="echoid-s3582" xml:space="preserve">Perche in queſto ſecondo caſo non ſi
              <lb/>
            può negare qualche condenſatione per quel tempo, ma
              <lb/>
            che procurando l’acqua liberarſi da eſſa, traſudaſse poi.</s>
            <s xml:id="echoid-s3583" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3584" xml:space="preserve">_@nt_. </s>
            <s xml:id="echoid-s3585" xml:space="preserve">Parmi che il Gaſsendo riferiſca vna ſimile eſperienza, e
              <lb/>
            dica che ammaccata la palla, e fatto in eſſa vn piccolo fo-
              <lb/>
            rame, da eſſo, come da vn ſpinello vſcì fuori dell’acqua; </s>
            <s xml:id="echoid-s3586" xml:space="preserve">in-
              <lb/>
            ditio manifeſtiſſimo della compreſsione, e conſtipatione,
              <lb/>
            che patiua.</s>
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