Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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              motus, nam poſtquam leuius corpus B ad æquabili­
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              tatem redigitur, continuatur adhuc
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              im­
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              petus in grauiori ſolido A; totum ergo id, quod au­
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              getur gradus impetus ipſius A creat notabilem ex­
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              ceſſum ſupra illum gradum debilem corporis B
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              ,
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              & vniformi gradu impetus excurrentis, quare neceſ­
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              sè eſt, vt propè initium motus parùm differant velo­
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              citates grauium A, & B, ſcilicèt fiant ſecundùm pro­
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              portiones ſuperiùs expoſitas, & poſtea in progreſſu
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              motus multò magis inter ſe differant. </s>
              <s id="s.002639">quod profectò
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              euincitur ex eo, quòd ſi prædicta inſignis inæqualitas
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              velocitatum, quę in progreſſu
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              eorum obſer­
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              uatur, eſſet propria, & naturalis horum corporum
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                per</expan>
              in eodem fluido in eadem proportione fieri de­
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              beret, ſcilicèt in quibuslibet temporibus æqualibus
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              moueri deberent proportionalibus velocitatibus, &
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              ſic medulla ſambuci v.g. quæ in decem minutis
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                dis</expan>
              horarijs pertranſit ſemiſſem itineris exacti à pila
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              marmorea, vt refert Merſennus, etiam in vno minuto
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              ſecundo illa medietatem ſpatij huius pertranſiret,
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              quod euidentèr falſum eſt.
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              Pro. 243. &
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              244.</s>
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              Pro. 245.</s>
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              Cap. 11. gra­
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              uia in fluido
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              velocitati­
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              bus inæqua­
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              libus ferri
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              debere.</s>
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            <p type="margin">
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              Prop. 241.
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              & 243.</s>
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              Reſponde­
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              tur experi­
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              mento
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                ſeni</expan>
              , & alio­
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              rum.</s>
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              <s id="s.002645">Hinc reſoluere poſſumus difficultatem ab experi­
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              méto Merſenni deſumptam; is enim ſumpſit duas pi­
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              las æquales, vnam plumbeam, alteram argillaceam,
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              & in profunditate trium pedum aquæ inſumpſit
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                bum</expan>
              vnum minutum
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              , argillacea verò quin­
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              que minuta ſecunda, noſter verò calculus minorem̨
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              inæ qualitatem efficit, dum enim pila plumbea
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                dit</expan>
              ſpatium aliquod in vno minuto ſecundo, argilla-</s>
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          </chap>
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