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

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              <s id="s.002172">
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              modum explicatur: Cylindrus aëris gravitans ſuſtinet, inquiunt, Mer­
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              curium IC, ejuſdem ſcilicet cum illo ponderis; eſtque perfectum inter
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              vtrumque æquilibrium; ſegmentum verò fiſtulæ CD omni corpore va­
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              cuum remanet, hæc porrò hypotheſis ex duplici præſertim capite effi­
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              caciter, vt aiunt ab aſſertore probatur. </s>
              <s id="s.002173">Primò, ex eo quod quæcumque tan­
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              dem ſit fiſtulæ altitudo & latitudo, ſegmentum extans (ſic appello IC)
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              æqualis ſemper ſit altitudinis IC. 2. ſcilicet pedum, & 1/3 vel 1/4. Secundò,
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              ex eo quod aquæ ſegmentum extans 32. ſcilicet pedum circiter
                <expan abbr="ejuſdẽ">ejuſdem</expan>
              ſit
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              cum ſegmento Mercurij extante ponderis; eſt enim fere gravitas Mercurij
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              ad gravitatem aquæ vt 14. ad 1. vis ergo æqualis ſuſtinet ſegmentum ex­
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              tans Mercurij 2. pedum 1/3, & ſegmentum extans aquæ 32. pedum; ſed illa
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              vis alia eſſe nequit à cylindro aëris gravitante. </s>
            </p>
            <p type="main">
              <s id="s.002174">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              </s>
              <s id="s.002175"> Accedit non leve adminiculum, ex eo quod à vitis accura­
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              tiſſimis probatum fuit, in vertice altiſſimum montium ſegmentum ex­
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              tans Mercurij eſſe minus IC ; quia ſcilicet cylindrus aëris gravitantis ac
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              ſuſtinentis prædictum ſegmentum extans, brevior eſt; igitur minor illius
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              vis & niſus. </s>
              <s id="s.002176">Qaod autem ſegmentum CD omnino vacuum ſit, vel ex eo
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              conſtat, quod inclinata fiſtula in BK, aſſurgit Mercurius & totum ſe­
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              gmentum CD occupat, non tamen videtur, quò abeat, aut ſe recipiat cor­
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              pus illud, quod vacuitatem CD occupabat, ſi fortè aliquod eſſet; ex quo,
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              ni fallor; nova confirmatio prioris partis ducitur; cum illa vis, quæ ſuſti­
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              net ſegmentum Mercurij IC in perpendiculo; ſufficiat ad ſuſtinendum
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              ſegmentum BK in plano inclinato, quod ex doctrina motuum facilè de­
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              monſtrarem, ſi res ita poſtularet. </s>
            </p>
            <p type="main">
              <s id="s.002177">
                <emph type="italics"/>
              Antim.
                <emph.end type="italics"/>
              </s>
              <s id="s.002178"> Non deſunt etiam alia adminicula, de quibus infra; accedunt
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              tamen graviſſimæ difficultates; omitto leviores, ne in nugis vos deti­
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              neam, & vt ab ea parte, quæ ad vacuum ſpectat, initium ducam, multa
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              reverà, opponuntur, quæ dubito, an ſolvi poſſint. </s>
              <s id="s.002179">Primò, Quiſquis adſtruit
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              huiuſmodi vacuum in ſegmento fiſtulæ CD, de omni corpore quamvis
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              alioquin tenuiſſimo, negat, quod ſpatium illud occupet; at ſi dixero, ibi
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              eſſe vel tenuem materiam Cartheſij, vel æthera, vel ſubtiliſſimum humo­
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              rem dilatatum, non dico certò, ſed probabiliter tantùm, quo quæſo ar­
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              gumento prædictum vacuum probare poterit? </s>
              <s id="s.002180">Secundò, Si vacuum eſt,
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              quomodo lumine perfunditur? </s>
              <s id="s.002181">Si enim lumen conſiſtit in effluvio quo­
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              dam igneo; vel in motione cujuſdam materiæ ſubtiliſſimæ, vt docent De­
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              mocritici; cum vacuitatem illam ſubeat, occupet, impleat, ibi certè va­
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              cuum non eſt; aut certè lumen eſt meta qualitas per medium diffuſa, vt
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              docent ij, qui meliùs cenſent; atque ita cùm qualitas ſine ſubjecto eſſe
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              non poſſit,
                <expan abbr="eoqūe">eoque</expan>
              corporeo, ſegmentum CD vacuum non eſt. </s>
              <s id="s.002182">Tertiò, Si
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              vacuum eſſet, totus quantus aër & æther, qui terreſtri globo vicinior eſt,
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              in dictum ſegmentum gravitaret ad ſtatuen dum æquilibrium. </s>
            </p>
            <p type="main">
              <s id="s.002183">
                <emph type="italics"/>
              Chryſoc.
                <emph.end type="italics"/>
              </s>
              <s id="s.002184"> Suſtine, quæſo; dici enim poteſt, æthera non eſſe gravem;
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              aut certè ſi gravis ſit; incredibilem eſſe proportionem gravitatis aëris ad
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              gravitatem ætheris, vtrum que deſtruit vim huius argumenti. </s>
            </p>
            <p type="main">
              <s id="s.002185">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              </s>
              <s id="s.002186"> Immo ſunt, qui dicunt, atmoſphæram tantùm gravitare, </s>
            </p>
          </chap>
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