Casati, Paolo, De igne dissertationes physicae, 1686

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            <s xml:id="echoid-s1917" xml:space="preserve">
              <pb o="59" file="0071" n="71" rhead="De ignis loco."/>
            ter depreſſo iterum vaſe, quia cylindrus Mercurialis fit altior di-
              <lb/>
            gitis 30, iterum diſtrahit ſpiritum, qui non valet ſe contrahen-
              <lb/>
            do conari, vt oppoſitum cylindrum attollat vltra digitos 30; </s>
            <s xml:id="echoid-s1918" xml:space="preserve">pro-
              <lb/>
            pterea ille adhuc immotus manet. </s>
            <s xml:id="echoid-s1919" xml:space="preserve">Hinc ſatis conſtat non eandem
              <lb/>
            eſſerationem, cùm aër inter cylindros Mercuriales intercipitur;
              <lb/>
            </s>
            <s xml:id="echoid-s1920" xml:space="preserve">ille enim ne quit aduersùs Mercurium, quamuis aliquatenus di-
              <lb/>
            minutum, præualere, vt illum attrahat; </s>
            <s xml:id="echoid-s1921" xml:space="preserve">propterea illorum mo-
              <lb/>
            tum conſequitur, prout ab hoc aut illo cylindro Mercuriali tra-
              <lb/>
            hitur.</s>
            <s xml:id="echoid-s1922" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1923" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s1924" xml:space="preserve">Satis diu à propoſito ſcopo diſputationem noſtram de
              <lb/>
            Ignis loco inſtitutam detorſiſſe videtur hæc aëris grauitas tanto-
              <lb/>
            pere celebrata. </s>
            <s xml:id="echoid-s1925" xml:space="preserve">Certè Ariſtoteles lib.</s>
            <s xml:id="echoid-s1926" xml:space="preserve">4. </s>
            <s xml:id="echoid-s1927" xml:space="preserve">de Cœlo text.</s>
            <s xml:id="echoid-s1928" xml:space="preserve">29. </s>
            <s xml:id="echoid-s1929" xml:space="preserve">poſtquam
              <lb/>
            aſſeruit lignum vnius talenti in aſe:</s>
            <s xml:id="echoid-s1930" xml:space="preserve">;re grauius eſſe, quàm plumbum
              <lb/>
            vnius libræ, at in aquâ leuius eſſe, apertiſſimè ait, *Omnia gra-*
              <lb/>
            *uitatem habent præter ignem, & </s>
            <s xml:id="echoid-s1931" xml:space="preserve">leuitatem præter terram.</s>
            <s xml:id="echoid-s1932" xml:space="preserve">* Vi-
              <lb/>
            dit ſcilicet Philoſophus grauia & </s>
            <s xml:id="echoid-s1933" xml:space="preserve">leuia comparatè dicenda cor-
              <lb/>
            pora, prout in medio prona ſunt in motum ſiuè ſurſum, ſiuè
              <lb/>
            deorſum, iuxta conſtipationis materiæ diſſimilitudinem. </s>
            <s xml:id="echoid-s1934" xml:space="preserve">Si igi-
              <lb/>
            tur aër cum igne comparatus grauis dici poteſt, cum aquâ & </s>
            <s xml:id="echoid-s1935" xml:space="preserve">ter-
              <lb/>
            râ collatus leuis eſt. </s>
            <s xml:id="echoid-s1936" xml:space="preserve">Quoniam itaque inſperantibus nobis cecidit,
              <lb/>
            vt in iſtum ſermonem delaberemur, redeamus, ſi placet, ad
              <lb/>
            ignem, & </s>
            <s xml:id="echoid-s1937" xml:space="preserve">immoderatiùs excurrat hodierna hæc noſtra collo-
              <lb/>
            cutio.</s>
            <s xml:id="echoid-s1938" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1939" xml:space="preserve">Maur. </s>
            <s xml:id="echoid-s1940" xml:space="preserve">Opportunè ſanè mones, Gradonice. </s>
            <s xml:id="echoid-s1941" xml:space="preserve">Quanquam ipſi
              <lb/>
            nobis diſputandi lex ſumus, neque vitio vertendum, quod phi-
              <lb/>
            loſophandi gratiâ digreſſi parumper fuerimus à cauſâ: </s>
            <s xml:id="echoid-s1942" xml:space="preserve">non adeò
              <lb/>
            tamen longè abducti fumus, quin ad præſentem de Ignis loco
              <lb/>
            quæſtionem aliquid vtilitatis conferat hæc de aëris leuitate aut
              <lb/>
            grauitate diſceptatio. </s>
            <s xml:id="echoid-s1943" xml:space="preserve">Nam ſi aër grauis, ſe deorſum vrgendo,
              <lb/>
            ſurſum extruderet flammam, hæc vtique ex ellychnijs erumpens
              <lb/>
            non in coni faſtigium deſineret, ſed potiùs in imâ baſi appareret
              <lb/>
            compreſſa ab aëre circunfluo, quemadmodum cùm mollem ceram
              <lb/>
            digitis intercluſam exprimimus. </s>
            <s xml:id="echoid-s1944" xml:space="preserve">Ipſa igitur flamma ſponte ſuâ
              <lb/>
            aſcendens ſibi, cunei in morem, viam aperit in aëre obſiſtente,
              <lb/>
            quia flamma leuior eſt quàm aër.</s>
            <s xml:id="echoid-s1945" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1946" xml:space="preserve">Grad. </s>
            <s xml:id="echoid-s1947" xml:space="preserve">Si aërem ſuâ virtute permeat flamma leuior, ſupre-
              <lb/>
            mus profectò in hac elementorum regione tribuendus eſt Igni lo-
              <lb/>
            cus, ſupra aërem aſcendere contendenti: </s>
            <s xml:id="echoid-s1948" xml:space="preserve">neque enim </s>
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