Fabri, Honoré, Dialogi physici in quibus de motu terrae disputatur, 1665

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            <p type="main">
              <s id="s.001087">
                <pb pagenum="95" xlink:href="025/01/099.jpg"/>
              ſenſu percipimus; is profectò, magis ridiculus non eſſet, qui diceret,
                <lb/>
              corpus grave deorſum trudi ab Angelo, quod tamen nulla ratione, nullo­
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              que experimento probari poteſt, quàm ij, qui dicunt, ab ea ſubtili materia
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              trudi, cùm nulla ratione, & nullo experimento id probare poſſint. </s>
            </p>
            <p type="main">
              <s id="s.001088">
                <emph type="italics"/>
              Antim.
                <emph.end type="italics"/>
              </s>
              <s id="s.001089"> Rectè omnino; neque id ab vllo cordato viro negari poteſt,
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              gravia ſcilicet ſponte ſua deorſum ire. </s>
            </p>
            <p type="main">
              <s id="s.001090">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              </s>
              <s id="s.001091"> Sed non item levia, quæ ideò ſurſum eunt, quia ſurſum à
                <lb/>
              graviore medio extruduntur; Supponamus enim corpus aliquod levius
                <lb/>
              graviori ſubeſſe; vel gravius
                <expan abbr="tãtùm">tantùm</expan>
              ſua ſponte deorſum ibit & ſurſum levius
                <lb/>
              extrudet; vel tantùm hoc ſua ſponte ſurſum aſcendet, ac deorſum ex­
                <lb/>
              trudet gravius; vel ſimul vtrumque ſua ſponte ibit; quod levius tantùm
                <lb/>
              nemo dixerit, & manifeſtæ convinci poſſet falſitatis. </s>
            </p>
            <p type="main">
              <s id="s.001092">
                <emph type="italics"/>
              Antim.
                <emph.end type="italics"/>
              </s>
              <s id="s.001093"> Scio neminem eſſe, qui hoc dicat; ſed quæſo te, fac, aliquem
                <lb/>
              eſſe; quomodò illum convinceres; dic mihi ſodes. </s>
            </p>
            <p type="main">
              <s id="s.001094">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              </s>
              <s id="s.001095"> In hunc modum; eo modo, quo ſurſum extruditur corpus
                <lb/>
              leve à gravi, aër v.g. ab aqua, cui ſubeſt, corpus grave deorſum detrude­
                <lb/>
              retur à levi, aqua, v. g. ab aëre, qui aquæ ſubeſſet: ſit ergo globus plum­
                <lb/>
              beus in aëre, ideò deſcendit, quia aër, qui ſubeſt, ſua ſponte aſcendens,
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              illum deorſum extrudit; ille autem Cylindrus aëris in globum levitat; ita
                <lb/>
              mihi loqui fas ſit, qui à globo ad terram vſque extenditur, vt patet; nec
                <lb/>
              enim is, qui eſt ſupra globum in illum levitat, ſed potiùs gravitaret; corpus
                <lb/>
              enim gravitat deorſum, ſurſum verò levitat; igitur ſi prædictus Cylin­
                <lb/>
              drus aëris primò ſit pedalis, ac deinde bipedalis, cùm tota vis gravitatio­
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              nis, ſeu detruſionis deorſum ſit ab aëre, qui eſt infra globum, & in eum le­
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              vitat; erit dupla vis detruſionis, ſeu gravitationis, quando aëris Cylin­
                <lb/>
              drus plumbeo globo ſubjectus erit duplus; dupla enim cauſa duplum effe­
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              ctum producit. </s>
            </p>
            <p type="main">
              <s id="s.001096">
                <emph type="italics"/>
              Antim.
                <emph.end type="italics"/>
              </s>
              <s id="s.001097"> Id quod dicis ex hoc experimento probari poteſt. </s>
              <s id="s.001098">Sit v. g.
                <lb/>
              Scyphus vacuus ſecundum perpendiculum in aquam immerſus, ore præ­
                <lb/>
              vio, ita vt nihil prorſus aëris ante in Scypho contenti avolare poſſit;
                <lb/>
              haud dubiè, quo profundiùs immergitur, major vis ſurſum illum extru­
                <lb/>
              dens ipſo tactu ſentitur; nempe totus aquæ ſuperpoſitæ, Cylindrus cujus
                <lb/>
              baſis ori vaſis, ſeu Scyphi circiter æqualis eſt, in aëra Scypho conten­
                <lb/>
              tam gravitat, magis autem, Cylindrus altior. </s>
            </p>
            <p type="main">
              <s id="s.001099">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              </s>
              <s id="s.001100"> Igitur ſi prædictus Scyphus ita immergatur, vt primum
                <lb/>
              vno palmo à ſuprema ſuperficie aqua diſtet, ac deinde profundiùs im­
                <lb/>
              mergatur, ita vt diſtet ab eadem ſuperficie duobus palmis, dupla tunc erit
                <lb/>
              vis gravitationis ; quia duplæ cauſæ duplus effectus eſt: igitur cùm ſit eadem
                <lb/>
              ratio, duplus Cylindrus aëris ſubjecti globo duplam vim motus in illum
                <lb/>
              execet, ſcilicet levitationis, quod tamen falſum eſſe conſtat. </s>
            </p>
            <p type="main">
              <s id="s.001101">
                <emph type="italics"/>
              Antim.
                <emph.end type="italics"/>
              </s>
              <s id="s.001102"> Non dico duplam vim motus, ſed tantùm dico majorem vim,
                <lb/>
              quod certè ad tuum propoſitum ſatis eſſe puto; cùm prædicti globi pon­
                <lb/>
              dus idem ſit, eademque vis illa, qua deorſum fertur, ſive vnum, ſive duos
                <lb/>
              palmos altus à terra pendatur. </s>
            </p>
            <p type="main">
              <s id="s.001103">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              </s>
              <s id="s.001104"> Non dicis duplam vim motus? </s>
              <s id="s.001105">dupla cauſa duplum effe-</s>
            </p>
          </chap>
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    </archimedes>
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