Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670
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              miter excauata, itaut externa eius ſuperficies ſit om­
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              ninò ſimilis, & æqualis figuræ externæ ipſius B; quo­
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              niam ſubſtantia corporea ple­
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              na ipſius E nedùm homogenea,
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              ſed prorsùs æqualis eſt ipſi A,
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              ſcilicèt vniùs libræ, erunt duo
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              corpora A, & E æqualia inter
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              ſe, & æquè grauia, licèt diuer­
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              ſas, & inæquales figuras habe­
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              ant, igitur A, & E in vacuo æ­
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              quali velocitate deſcendent.
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              <s id="s.002349">poſtea quia duorum corporum B, & E pondera abſo­
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              luta æquantur ponderi eiuſdem A, igitur illa æqua­
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              lia
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              inter ſe grauitate abſoluta, & à ſimilibus, ęqua­
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              libus, & ſimiliter poſitis figuris
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              , er­
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              go æqualibus velocitatibus, cum in pleno fluido, tum
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              in vacuo deſcendent. </s>
              <s id="s.002350">quare A, & B æquè velocia ipſi
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              E erunt, & ideò interſe. </s>
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              Cap. 10. de
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              æquitempo­
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              ranea natu­
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              rali veloci­
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              tate
                <expan abbr="grauiũ">grauium</expan>
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              Pr. 210.
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              Pr. 209.</s>
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              PROP. CCXII.
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              Quælibet duo corpora inæqualitèr grauia in vacuo æquè
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              velocitèr deſcendent.
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              <s id="s.002355">SInt duo corpora A, & B quorum A grauius ſit,
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              B; moles verò ipſius A ponatur, vel maior, aut
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              æqualis, vel minor mole alterius B, ſcilicèt ſint præ­
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              dicta corpora eiuſdem grauitatis ſpecificæ, vel non,
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              dummodò eorum pondera abſoluta inæqualia ſint.
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              <s id="s.002356">Dico in vacuo æquè velocia eſſe. </s>
              <s id="s.002357">Si hoc verum noņ </s>
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