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

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          <p>
            <s xml:id="echoid-s5389" xml:space="preserve">
              <pb o="85" file="00179" n="179" rhead="_QVINTO._"/>
            le ſi poſſi alzare perpendicolarmente, & </s>
            <s xml:id="echoid-s5390" xml:space="preserve">infondendo nel
              <lb/>
            vaſo del mercurio, il circoletto non aſcenderà in conto
              <lb/>
            alcuno benche tanto più leggiero del mercurio. </s>
            <s xml:id="echoid-s5391" xml:space="preserve">Anzi che
              <lb/>
            chi procurerà alzarlo, tirandolo con quel ſpaghetto; </s>
            <s xml:id="echoid-s5392" xml:space="preserve">ciò
              <lb/>
            non potrà fare che adoperando forza, che poſſi ſuperare il
              <lb/>
            peſo di quel mercurio, che ſopraſta al circoletto. </s>
            <s xml:id="echoid-s5393" xml:space="preserve">Ma ſe poi
              <lb/>
            s’alzerà qualche poco, di modo che il mercurio poſſi prin-
              <lb/>
            cipiare ad inſinuarſi ſotto d’eſſo; </s>
            <s xml:id="echoid-s5394" xml:space="preserve">ſubito ſarà ſpinto insù
              <lb/>
            con moto velociſſimo.</s>
            <s xml:id="echoid-s5395" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5396" xml:space="preserve">_Ofre._ </s>
            <s xml:id="echoid-s5397" xml:space="preserve">Queſta eſperienza non mi cagiona punto di merauiglia,
              <lb/>
            ne punto miperſuade; </s>
            <s xml:id="echoid-s5398" xml:space="preserve">correndo quà la medema ragione,
              <lb/>
            che corre nell’eſempio tritiſſimo delle due laſtre ottima-
              <lb/>
            mente ſpianate, e congionte, che alzandone vna petpen-
              <lb/>
            dicolarmente, ſegue l’altra il ſuo moto, ne ſi ſeparano _ne_
              <lb/>
            _detur vacuum_ tanto abborrito dalla natura. </s>
            <s xml:id="echoid-s5399" xml:space="preserve">Non aſcende il
              <lb/>
            circoletto, non potendoſi ſeparare dal fondo del vaſo ac-
              <lb/>
            ciò non ſi dia il vacuo, che neceſſariamente biſogneria che
              <lb/>
            ſi daſſe per quel tempo, che ſaria neceſſario al moto del
              <lb/>
            mercurio à riempire il ſpatio contenuto trà il circoletto,
              <lb/>
            & </s>
            <s xml:id="echoid-s5400" xml:space="preserve">il fondo del vaſo.</s>
            <s xml:id="echoid-s5401" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5402" xml:space="preserve">_Mat._ </s>
            <s xml:id="echoid-s5403" xml:space="preserve">Anco lei Sig. </s>
            <s xml:id="echoid-s5404" xml:space="preserve">Ofredi è trà li fautori di queſto vacuo, al
              <lb/>
            quale forſe la natura non ha vn abborrimento immagina-
              <lb/>
            bile? </s>
            <s xml:id="echoid-s5405" xml:space="preserve">Perche ſarà ſtaccato il circoletto, ſenza che rouini il
              <lb/>
            mondo, da chi ſarà alzato con forza, che ſupcri il peſo del
              <lb/>
            mercurio, che li ſouraſta. </s>
            <s xml:id="echoid-s5406" xml:space="preserve">Horsù il Sig. </s>
            <s xml:id="echoid-s5407" xml:space="preserve">Borelli _nella prop._
              <lb/>
            </s>
            <s xml:id="echoid-s5408" xml:space="preserve">82. </s>
            <s xml:id="echoid-s5409" xml:space="preserve">li leua queſto ſutterfugio con vna caſtigata eſperien-
              <lb/>
            za, che dice d’hauer fatto nell’Accademia Fiorentina. </s>
            <s xml:id="echoid-s5410" xml:space="preserve">Nel
              <lb/>
            vaſo ABCD, che há il concauo
              <lb/>
            AEFD, & </s>
            <s xml:id="echoid-s5411" xml:space="preserve">il forame E F, poſe la
              <lb/>
              <figure xlink:label="fig-00179-01" xlink:href="fig-00179-01a" number="34">
                <image file="00179-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/9EXVCG1R/figures/00179-01"/>
              </figure>
            palla di legno G, che bene l’ottur
              <lb/>
            raſſe, ma poteſſe girarſeli intor-
              <lb/>
            no; </s>
            <s xml:id="echoid-s5412" xml:space="preserve">edi ſotto li fece il forame
              <lb/>
            HEF, poi riempì il vaſo di mer-
              <lb/>
            curio ſin’all’ AD. </s>
            <s xml:id="echoid-s5413" xml:space="preserve">In queſto caſo
              <lb/>
            aſcendendo la palla non vi era
              <lb/>
            pericolo di vacuo, potendo ſuc-
              <lb/>
            ceder l’aria, e pure non aſceſe in
              <lb/>
            conto alcuno, perche il </s>
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