Gassendi, Pierre, De proportione qua gravia decidentia accelerantur, 1646

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              licam, neque tantum temporis, exſcendendo, quan­
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              tum aſcendendo conſumi; ac proinde lapidem illum
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              neque peruenturum ad mali carcheſium, neque reca­
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              ſurum in pedem eiuſdem: verùm iſta aut colliguntur
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              ex ijs, quæ ſunt dicta in Epiſtolis, aut in promptu
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              ſunt, facileque occurrunt. </s>
              <s id="s.000426">Et de Definitione huc­
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              vſque. </s>
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              De Poſtulato Galilei circa Motum ſuper æquè altis, non
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              æquè inclinatis planis.
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              <s id="s.000428">XIII. </s>
              <s id="s.000429">Inſectaris ſecundo loco, tanquam aliam
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              erroris cauſſam, Quod Galileus ſibi dari, & gratis
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              concedi, inquis, poſtulat,
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              Gradus velocitatis eiuſdem
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              mobilis ſuper diuerſas planorum inclinationes acquiſitos tunc
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              eſſe æqualeis, cùm eorumdem planorum eleuationes ponuntur
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              æquales;
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              hoc eſt gradus velo­
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              citatis ab eodem globo (exem­
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              pli gratia) per plana CA, &
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              CD deſcendente, in punctis
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              A, & D acquiſitos, eſſe inter ſe
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              æqualeis, quòd æqualem, vel potiùs eandem eleua­
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              tionem habeant, videlicet BC.
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              Hoc enim poſtula­
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              tum,
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              inquis,
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              cùm neque ex terminis notum ſit, neque vlla
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              ſufficiente experientia confirmatum; imò cùm rationes etiam
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              non deſint, quibus oppoſitum probabilius reddatur (nempe
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              gradus velocitatis per longius planum acquiſitos gradibus
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              per breuius planum acquiſitis eſſe minores) id à Galileo non
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              peti, ſed debuerat demonſtrari cùm præſertim maxima pars
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              ſubſequentium theorematum hoc vnico postulato nitantur.
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              </s>
              <s id="s.000430">Quid enim certi ex incertis concludi poteſt. </s>
              <s id="s.000431">aut ex principie,
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