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

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            <s xml:id="echoid-s5178" xml:space="preserve">_Cont._ </s>
            <s xml:id="echoid-s5179" xml:space="preserve">Tanto che non ſempre nell’aſcendere l’aria per l’acque
              <lb/>
            ſi faſtigia in figura conoidale, ò curua?</s>
            <s xml:id="echoid-s5180" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5181" xml:space="preserve">_Mat._ </s>
            <s xml:id="echoid-s5182" xml:space="preserve">Non certo nel largo. </s>
            <s xml:id="echoid-s5183" xml:space="preserve">Et à queſto propoſito l’altro gior-
              <lb/>
            no in piazza accidentalmente hò veduto appreſſo vn bo-
              <lb/>
            tegaio alcune di qúelle ampolline curue, eritonde, che
              <lb/>
            riempiono d’acqua con trè, ouero quattro di quelli glo-
              <lb/>
            betti di vetro, che hieri diſſi eſſer adoperati dalli ciarlatani,
              <lb/>
            le quali ampolline ſerrate al lume, cioè ſigillate herme-
              <lb/>
            ticamente, e poi voltate, e riuoltate ſempre moſtrano le
              <lb/>
            predette sferette nella parte ſuperiore. </s>
            <s xml:id="echoid-s5184" xml:space="preserve">Hauendo adunque
              <lb/>
            oſſeruato che conteneuano dette ampolline oltre all’ ac-
              <lb/>
            qua, e sferette, anco vn poco d’aria, preſene vna in mano
              <lb/>
            prencipiai a voltarla, e riuoltarla per oſſeruare li moti, e
              <lb/>
            figure dell’aria nel ſalire alla parte ſuperiore; </s>
            <s xml:id="echoid-s5185" xml:space="preserve">e vidi che
              <lb/>
            que ſta nel ſalire non formaua quella figura curua come
              <lb/>
            con oide, ne aſcendaua per il mezzo, ma ò vnita, ò diuiſa
              <lb/>
            aſ cendeua radendo ſempre qualche lato della ſuperficie
              <lb/>
            in teriore della carafina con figura aſlai larga, & </s>
            <s xml:id="echoid-s5186" xml:space="preserve">irregola-
              <lb/>
            re. </s>
            <s xml:id="echoid-s5187" xml:space="preserve">Anzi che quando dalla parte della cin a aſcendeua ver
              <lb/>
            ſo il fondo, ò baſe (che come ſano loro Signori è largo, e
              <lb/>
            cauo con la cauità entro l’ampolletta) afceſa l’aria, non
              <lb/>
            circondaua tutto il fondo ma ſtaua, ò vnita tutta inſieme
              <lb/>
            in vna parte d eſſo, ò diuiſa in più parti.</s>
            <s xml:id="echoid-s5188" xml:space="preserve"/>
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            <s xml:id="echoid-s5189" xml:space="preserve">_ofred._ </s>
            <s xml:id="echoid-s5190" xml:space="preserve">Il medemo hò oſſeruato io con vna di quelle ampolli-
              <lb/>
            nette fatte à Murano, che chia miamo da vn bezzo, riem-
              <lb/>
            pendola d’acqua con vn poco d’aria, & </s>
            <s xml:id="echoid-s5191" xml:space="preserve">otturando il bucco
              <lb/>
            del ſuo collo con il dito.</s>
            <s xml:id="echoid-s5192" xml:space="preserve"/>
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          <p>
            <s xml:id="echoid-s5193" xml:space="preserve">_Cont._ </s>
            <s xml:id="echoid-s5194" xml:space="preserve">Che quando l’aria aſcende per illargo non formi la fi-
              <lb/>
            gura conoidale, è manifeſto quando ſi vedono ſalire per
              <lb/>
            l’acqua quelli efluuii delli quali habbiamo parlato hieri
              <lb/>
            matina ò altte bolle d’aria, che appunto ſono come tan-
              <lb/>
            te bolle di figure più ò meno curue.</s>
            <s xml:id="echoid-s5195" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5196" xml:space="preserve">_Mat._ </s>
            <s xml:id="echoid-s5197" xml:space="preserve">Di più, mi vene in penſiero d’oſſeruare ſe nelli cannelli-
              <lb/>
            nidritti, & </s>
            <s xml:id="echoid-s5198" xml:space="preserve">anguſti l’aria aſcendeſſe ecome. </s>
            <s xml:id="echoid-s5199" xml:space="preserve">Si che preſi
              <lb/>
            diuerſidi queſti, le cauirà delli quali erano diuerſe, ma che
              <lb/>
            non eccedeuano la capacità d’vn grano di ſorgo, e riempi-
              <lb/>
            teli quaſi d’acqua con il ſucchiare, laſciatili però da vna
              <lb/>
            parte più, e meno quantità d’aria, eriuoltatoli, queſta </s>
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