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

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            <s xml:id="echoid-s5199" xml:space="preserve">
              <pb o="79" file="00173" n="173" rhead="QVINTO."/>
            aſcendeuain conto alcuno ſe non foſſe ſtata pòchiſſima;
              <lb/>
            </s>
            <s xml:id="echoid-s5200" xml:space="preserve">anzi che quanto più era, ſtaua più immobile.</s>
            <s xml:id="echoid-s5201" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5202" xml:space="preserve">Da queſte oſſeruationi fatte da me parmi di poter ragione-
              <lb/>
            uolmente dedurre non eſſer proprio dell’aria aſcender per
              <lb/>
            l’acqua con quella figura curua, e nel modo che dice ilP-
              <lb/>
            Riccioli, perche quando ciò foſſe ſuo proprio, aſcendereb-
              <lb/>
            be, e nel largo, e nel ſtretto. </s>
            <s xml:id="echoid-s5203" xml:space="preserve">Ma nel largo ſaliſce velociſ-
              <lb/>
            ſima con figura larga, compreſſa, ondegiante, & </s>
            <s xml:id="echoid-s5204" xml:space="preserve">irregola-
              <lb/>
            re, allilati, e non ſempre per il mezzo. </s>
            <s xml:id="echoid-s5205" xml:space="preserve">Adunque non è
              <lb/>
            proprio il ſalire così, ma ſolo ſaliſce in quel modo nel tu-
              <lb/>
            bo predetto.</s>
            <s xml:id="echoid-s5206" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5207" xml:space="preserve">Di più, non così ſi figura quando aſcende in poca quantita,
              <lb/>
            perche allora forma come globetti. </s>
            <s xml:id="echoid-s5208" xml:space="preserve">In oltre non ſaliſce
              <lb/>
            così nellitubi molto ſtretti, nelli quali non ſaglie in conto
              <lb/>
            alcuno quando ſia in notabile quantità, la quale quanto
              <lb/>
            maggiore, tanto la rende più immobile. </s>
            <s xml:id="echoid-s5209" xml:space="preserve">Non mi pare a-
              <lb/>
            dunque che dal ſalire così faſtigiata nel tubo del P. </s>
            <s xml:id="echoid-s5210" xml:space="preserve">Riccio-
              <lb/>
            li ſi poſſa inferire leggierezza poſitiua mediante la quale
              <lb/>
            aſcenda primiera _natura, & </s>
            <s xml:id="echoid-s5211" xml:space="preserve">cauſalitate,_ come dice egli, eſ-
              <lb/>
            ſendo cagione con il ſuo aſcendere che deſcenda l’acqua;
              <lb/>
            </s>
            <s xml:id="echoid-s5212" xml:space="preserve">credendo io più toſto, ammaeſtrato da tante eſperienze,
              <lb/>
            che intanto aſcendi, perche ſia ſcacciata, & </s>
            <s xml:id="echoid-s5213" xml:space="preserve">eſtruſa dall’ac-
              <lb/>
            qua, che diſcende; </s>
            <s xml:id="echoid-s5214" xml:space="preserve">di modo che quando queſta non può di-
              <lb/>
            ſcendete, come ſi è veduto nelli cannellini, non aſcenda
              <lb/>
            in conto aicuno. </s>
            <s xml:id="echoid-s5215" xml:space="preserve">Quella figura adunque faſtigiata, e co-
              <lb/>
            noidale è parto del ſalire per quel tubo, e non del ſalire
              <lb/>
            preciſamente. </s>
            <s xml:id="echoid-s5216" xml:space="preserve">Anzi che il Sig Borelli, il quale _nella prop-_
              <lb/>
            _72._ </s>
            <s xml:id="echoid-s5217" xml:space="preserve">propone vniuerſalmente. </s>
            <s xml:id="echoid-s5218" xml:space="preserve">_Et primo ostendendum est, quod_
              <lb/>
            _quodlibet fluidum intra aliud fluidum traslatum ſiue virtute pro-_
              <lb/>
            _pria, ſiue aliena violentia impulſum, dummodo eius partes non_
              <lb/>
            _diſſipentur in ipſo fluido in quo mouetur, ſed ſe mutuò conting ant,_
              <lb/>
            _& </s>
            <s xml:id="echoid-s5219" xml:space="preserve">vniantur neceſſario tumorem, & </s>
            <s xml:id="echoid-s5220" xml:space="preserve">rotundam figuram acquiret_
              <lb/>
            _in parte anteriori motus eius,_ nella proua poi di queſta faſti-
              <lb/>
            glatione ſi ſerue di diſcorſo eſemplificato, & </s>
            <s xml:id="echoid-s5221" xml:space="preserve">appropriato a
              <lb/>
            queſto rubo; </s>
            <s xml:id="echoid-s5222" xml:space="preserve">dal quale ſi comprende, che non ſi faſtigia s
              <unsure/>
            t
              <lb/>
            _facilius peruadat aquam, & </s>
            <s xml:id="echoid-s5223" xml:space="preserve">quaſi perforet illam ea figura,_ come
              <lb/>
            dice, e pretende il Riccioli.</s>
            <s xml:id="echoid-s5224" xml:space="preserve"/>
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          <p>
            <s xml:id="echoid-s5225" xml:space="preserve">_
              <gap/>
            nt._ </s>
            <s xml:id="echoid-s5226" xml:space="preserve">A propoſito dinon ſalire l’aria nelli cannelli anguſti, </s>
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