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

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              ab eo ſeſe expediant; Noſtri tamen eo non vtuntur, vtpote qui ſciant,
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              ex dicta inæqualitate, etiam ſuppoſita, minimè ſequi aquarum excur­
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              ſiones, nempè eo motu ſingulæ partes illius globi moventur, ſeu tardiùs,
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              ſeu velociùs, quo totius motus ratio illas moveri poſtulàt; ac proinde il­
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              lud globi punctum, quod ad Solem directè ſpectat de Meridie, tardè
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              movetur in Ortum, celeriter verò, vbi eſt oppoſitum in ipſa media no­
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              cte; quia totus globus ita moveri poſtulat ſingulas ſui partes, imò etiam
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              in iis, quæ vaſe vehuntur, & ab extrinſeco motum & impetum recipiunt,
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              inæqualitas motus non ex abrupto, at ſenſim ſine ſenſu inducta nullum
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              alium effectum præter eandem rationem motus inducit; ſic cymba qua
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              vehitur aqua celeri motu, ſi ſenſim remittit, ac retardat motum, aut
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              certè tardiorem primum paulatim deinde accelerat, neque huc, neque
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              illuc aqua excurrit, nec ſtantes in navi huc aut illuc inclinari ſe ſentiunt. </s>
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              Antim.
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              <s id="s.000514"> Ita eſt; vt dicis; hoc argumentum contra illos ad hominem,
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              vt aiunt, à me adductum eſt, qui præfatos effectus ex illa motuum inæ­
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              qualitate ſequi aſſerunt; at per te, mihi quæſo, liceat, idem argumen­
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              tum etiam contra illos proſequi & vrgere, vt aiunt, qui negant dictos
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              effectus ex dicta inæqualitate ſequi, quorum ego; vt vereor ſenſa, ita
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              illis, opinor, ingratum non accidet, quod rem hanc paulò accura­
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              tiùs diſcutiam, & ad certiſſima doctrinæ motuum principia reducam;
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              Primò ergo quidem ſuppono ex dicta doctrina, impetum ſemel impreſ­
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              ſum non deſtrui, quamdiu fruſtrà non eſt, & conſequi poteſt ſuum ef­
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              fectum, ſcilicet motum, qui & finis illius eſt, ſeu per eandem lineam,
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              ſeu per aliam, ad quam eſt nova determinatio; nulla enim eſt alia ratio,
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              propter quam impetus deſtruatur; ſic turbo v.g. diſcus æneus, Axe vtrim­
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              que extante, in levigato plano diutiſſimè ſuos orbes agit, & ſi nullus
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              eſſet attritus partium, & Axis ad perfectam libellam, per diſci centrum
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              iret, nunquam hic motus ceſſaret. </s>
              <s id="s.000515">Prætereà, ſi globus tornatus deſcen­
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              dat per planum declive probè lævigatum, quod poſt tantulam incurvatio­
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              nem ſurſum ex adverſo, ſub eodem inclinationis angulo deflectatur; haud
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              dubiè ad imum primi plani declivis globus non ſiſtet, ſed per aliud ad
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              æqualem ferè altitudinem aſcendet, virtute impetus, in primo deſcenſu
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              acquiſiti, ad hanc portò lineam ab eodem plano determinatur; analo­
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              giam perfectam in vibrato funependulo etiam habes, & in ipſa corporum
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              repercuſſione; deſtruitur tamen aliquid impetus in illo aſcenſu, ſcilicet
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              à quodam impetu innato, non acquiſito, qui gravibus ineſt, &, vt fa­
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              cilè vobis perſuaderem, ab ipſa gravitate non diſtinguitur; ſic etiam ab
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              alio impetu obſtante, vel ad aliam lineam trahente, vnde ſequitur de­
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              terminatio quædam mixta, ſenſim deſtruitur; ſed ne longiùs excurram,
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              illa omnia doctrinæ motuum principia hoc loco dumtaxat ſupponam, quæ
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              huius doctrinæ petiti facilè concedunt, & fusè alibi pertractata nec non
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              firmata fuêre. </s>
              <s id="s.000516">Primo igitur loco ſuppono, impetum nunquam deſtrui,
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              niſi quando eſt fruſtrà, id eſt, quando motus omnis impeditur, à quo­
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              cunque tandem ſit ille impetus, ſive impreſſus ab extrinſeco, ſive ab ipſo
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              corpore in ſe productus, ſive à toto, parti, ſive toti à parte, ſive parti ab alia
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              parte, nam perinde eſt, quoad hoc principium. </s>
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