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

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              <s id="s.001766">
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              ejuſdem cum lapide molis competit; at verò pars aëris, quæ in medio aëre
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              per Horizontalem movetur, cum aliis ſibi ſubjectis, & impoſitis, gravitatio­
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              ne communi gravitat. </s>
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            <p type="main">
              <s id="s.001767">
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              Antim.
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              </s>
              <s id="s.001768"> Per vos mihi liceat, breve Parergon interferete, vt hæc meliùs
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              intelligantur. </s>
              <s id="s.001769">Corpus, quod eſt in medio, vel ejuſdem eſt cum medio gra­
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              vitatis, vel majoris, vel minoris; ſi minoris, innatat medio; ſi majoris, im­
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              mergitur; ſi æqualis, in quocunque loco illud colloces, ibi manet: porrò
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              corpus humido innatans, gravitatione communi cum ipſo medio gravitat;
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              cujus rei luculentum exémplum, vel experimentum attuliſti, Auguſtine; nem­
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              pe totum illud vas appenſum 25. libr. pendit, ſive lignum quieſcat, ſive flu­
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              ctuet; ſive in fundo vaſis atte retineatur; ſive ſurſum emergat; ſive per
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              Horizontalem feratur: Et verò vbi nihil propriæ & ſingularis gravitatio­
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              nis retinet, in communem gravitationem totam ſuam vim refundit; hinc
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              manus ligno innatanti ſuppoſita nullum pondus ſentit, niſi fortè illud tan­
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              tulum attollas, vel filo ex parte immerſum ſuſtineas; tunc enim vas ipſum
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              minùs pendit; v.g. ſi dum lignum ex parte immerſum ſuſtines, ſentis trium
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              libr.pondus, vas 22. libr. </s>
              <s id="s.001770">tunc erit; hinc ſi vas dextrâ, lignum verò filo ap­
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              penſum ſiniſtrâ ſuſtineas, vtraque ſimul totum pondus, ſed qua propor­
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              tione plus ligni ſiniſtra ſuſtinet, eadem in vaſe dextera minus pondus ſu­
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              ſtinet: porrò ſi corpus aqua gravius ſit, v.g.plumbum, haud dubiè immer­
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              gitur, ſit v.g, idem vas 20. libr.ſit pila plumbea 10. libr. </s>
              <s id="s.001771">vbi hæc fundum
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              vaſis attigit, totum vaſis pondus erit 30.libr.at ſi vas pendatur eo dumtaxat
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              tempore, quo pila plumbea per aquam deſcendit, ſupra 20. libr. </s>
              <s id="s.001772">illam tan­
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              tum ponderis acceſſionem ſenties, quam aqua, vt ſic loquar, plumbo detra­
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              hit, æqualem ſcilicet ponderi portionis aquæ, ejuſdem molis; ſupponamus
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              autem gravitatem plumbi eſſe decuplam gravitatis aquæ, vas erit 21. libr.
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              </s>
              <s id="s.001773">idem ſiet, ſi pila omnino immerſa filo ſuſtineatur. </s>
              <s id="s.001774">Hinc duo Paradoxa facilè
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              deducetis; primum ſit, corpus leve, quod ſurſum per mediam aquam vaſe
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              contentam emergit, magis gravitat in eum, qui vas ipſum ſuſtinet, quàm
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              corpus grave, quod per mediam aquam deorſum fertur: ac proinde corpus
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              levius majorem vim gravitationis exerit, quàm gravius; hinc quò plus ſin­
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              gularis gravitationis corpus retinet intra medium vaſe contentum, mino­
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              rem vim facit adversùs illum, qui vas ſuſtinet; & quoad vim ponderis, perin­
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              de eſt, ſive prædicta pila plumbea liberè per aquam deorſum eat, ſive aquæ
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              immerſa & filo appenſa ſuſtineatur; contra verò quò minus ſingularis gra­
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              vitationis corpus retinet, eò magis gravitat in eum, qui præfatum vas ſu­
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              ſtinet. </s>
              <s id="s.001775">Alterum Paradoxum eſt: Quiſquis prædictum vas portat, præter 20.
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              libr. aquæ 1. libram plumbi ſuſtentat, quamvis alioquin plumbum immer­
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              ſum & filo appenſum ab infinita potentia ſuſtineatur; quia ſcilicet me­
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              dium 1/18 gravitationis plumbo detrahit, ſcilicet 1. libram: cùm igitur ille
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              aëris tractus, qui à vento igitur, nihil propriæ gravitationis retineat, ſed to­
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              tam in communem conferat, quamvis per diverſas lineas ſurſum deorſum­
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              ve, dextrorſum aut ſiniſtrorſum à vento agatur, nullam tamen proprij pon­
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              deris jacturam facit, ſed totam illius vim ac niſum exerit gravitatione com­
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              muniquare hoc nodo ſoluto, vide, an quidpiam aliud occurrat, quod nobis
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              opponas. </s>
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