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

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            <s xml:id="echoid-s2462" xml:space="preserve">
              <pb o="75" file="00081" n="81" rhead="SECONDO."/>
            eſſe vim, & </s>
            <s xml:id="echoid-s2463" xml:space="preserve">elaterium aeris, qui apertum tubi orificium ſubintrans,
              <lb/>
            Hydrargirum impendentem, ſurſum uerſus pellit. </s>
            <s xml:id="echoid-s2464" xml:space="preserve">Nam quo @inſtan-
              <lb/>
            te, celeriuſculè tubi orificium ex stagnante Hydrargiro educitur, ex-
              <lb/>
            tans Mercurius vna cum tubo alleuatur, non totus; </s>
            <s xml:id="echoid-s2465" xml:space="preserve">nam porciunculæ
              <lb/>
            quædam in inferius vaſculum delabuntur: </s>
            <s xml:id="echoid-s2466" xml:space="preserve">vnde tubi orificio plenè ex-
              <lb/>
            tra ſuperficiem alleuato, incumbens aer, quaſi perſentiſcens impen-
              <lb/>
            dentem Mercurium, aliquid de ſua grauitate deperdidiſſe, & </s>
            <s xml:id="echoid-s2467" xml:space="preserve">iam
              <lb/>
            ſolito leuiorem, ſtatim orificium irrumpit, Mercuriumq; </s>
            <s xml:id="echoid-s2468" xml:space="preserve">non abſque
              <lb/>
            impetu ad tubi verticem propellit. </s>
            <s xml:id="echoid-s2469" xml:space="preserve">Secundi Phænomeni cauſa, & </s>
            <s xml:id="echoid-s2470" xml:space="preserve">ra-
              <lb/>
            tio videtur bæc: </s>
            <s xml:id="echoid-s2471" xml:space="preserve">quoniam dum leniter, lentoque gradu tubi orificium,
              <lb/>
            è refuſo Mercurio in apertum aerem ſuſtollo, nihil omnino impẽdentis
              <lb/>
            Hydrargiri, in inferius vaſculum delabitur;</s>
            <s xml:id="echoid-s2472" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2473" xml:space="preserve">_Matem._ </s>
            <s xml:id="echoid-s2474" xml:space="preserve">Si fermi caro Sig. </s>
            <s xml:id="echoid-s2475" xml:space="preserve">Conte, che poi ſeguitarà. </s>
            <s xml:id="echoid-s2476" xml:space="preserve">Io dubito
              <lb/>
            grandemente di queſte ſuppoſitioni, che in pratica non ſe-
              <lb/>
            gua tutto il contrario, cioè che non ſolo nell’alzamento ve-
              <lb/>
            loce nulla dell’argento viuo della fiſtola cada nel vaſo, ma
              <lb/>
            che più toſto di quello dal vaſo ſegua quello della fiſtola. </s>
            <s xml:id="echoid-s2477" xml:space="preserve">Al
              <lb/>
            contrario nell’alzamento fatto pian piano, che almeno ſe
              <lb/>
            non cade di quello della fiſtola nel vaſo, certo di quello del
              <lb/>
            vaſo non ſegua quello della fiſtola. </s>
            <s xml:id="echoid-s2478" xml:space="preserve">E la ragione è, perche
              <lb/>
            nella preſta trattione, nella quale ſi debba farela ſeparatione
              <lb/>
            di due corpi, vno ſegue l’altro; </s>
            <s xml:id="echoid-s2479" xml:space="preserve">ilche nõ ſi fà nella trattione
              <lb/>
            lenta. </s>
            <s xml:id="echoid-s2480" xml:space="preserve">Sc vn quadrello ſarà ſopra vn’altro, ſe con preſtezza
              <lb/>
            alzerò il ſuperiore, l’inferiore lo ſeguirà per qualche poco;
              <lb/>
            </s>
            <s xml:id="echoid-s2481" xml:space="preserve">il che non ſuccede ſe alzarò pian piano. </s>
            <s xml:id="echoid-s2482" xml:space="preserve">Così ſe vn galleg-
              <lb/>
            giante ſi vorrà cauar dall’acqua con preſtezza, ſi vedrà non
              <lb/>
            poco alzamento di queſta, il quale non riuſcirà così grande
              <lb/>
            nella cauata piaceuole. </s>
            <s xml:id="echoid-s2483" xml:space="preserve">Mà queſti miei dubii ſiano come
              <lb/>
            non detti. </s>
            <s xml:id="echoid-s2484" xml:space="preserve">Concediamo pur anco al Signor Sinclaro, che ſia
              <lb/>
            vero quanto dice; </s>
            <s xml:id="echoid-s2485" xml:space="preserve">vediamo pure il rimanente della cauſa
              <lb/>
            della diſparità, ch’aſſegna.</s>
            <s xml:id="echoid-s2486" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s2487" xml:space="preserve">Conte. </s>
            <s xml:id="echoid-s2488" xml:space="preserve">Sed integer cylindrus, iuſtum renitentis aeris æquipodivm ſimul
              <lb/>
            cum tubo alleuatur: </s>
            <s xml:id="echoid-s2489" xml:space="preserve">vndè quaſi perſentiſcens ille, impendentem Hy-
              <lb/>
            drargirum nihil de ſua grauitate amiſiſſe, & </s>
            <s xml:id="echoid-s2490" xml:space="preserve">ſibi etiam viribus pa-
              <lb/>
            rem permanere, illum ſuo loco pellere nequit.</s>
            <s xml:id="echoid-s2491" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2492" xml:space="preserve">_Matem._ </s>
            <s xml:id="echoid-s2493" xml:space="preserve">Io non mi poſſo perſuadere in conto a lcuno, che queſt’-
              <lb/>
            effetto prouenga dalla ſola grauità, & </s>
            <s xml:id="echoid-s2494" xml:space="preserve">elaterio dell’aria; </s>
            <s xml:id="echoid-s2495" xml:space="preserve">per-
              <lb/>
            che già la grauità dell’aria eſercita tutto il ſuo momento, </s>
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