Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670
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              pore a contenta in grauiori corpore
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              A ad vim percuſſiuam compoſitam
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              ex impetu V, & ex minori materia­
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              li ſubſtantia in B contenta; debilior
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              verò vis percuſſiua ab eadem
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              ſtentia, & glutine eiuſdem fluidi R
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              T citiùs debilitatur extinguitur que
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              quàm magis valida vis percuſſiua­
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              igitur energia percuſſiua ſolidi B ci­
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              tiùs ad
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              reducetur,
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              maior vis percuſſiua corporis A. </s>
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              Prop. 223.</s>
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              De vi per­
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              cuſs. </s>
              <s id="s.002633">pr. 27.</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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              Ibid. ex pro.
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              9. & ex cap.
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              PROP. CCXLVI.
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              Si comparentur velocitates corporum æqualium, & inæ­
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              qualitèr grauium propè principium deſcenſus in fluido,
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              minori inæqualitate feruntur, quàm in progreſſu, & con­
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              tinuatione motus.
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              <s id="s.002638">SInt eadem corpora æqualia, & inæqualitèr gra­
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              uia A, & B; procùl dubio ambo per aliquod
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                pus</expan>
              mouentur accelerato motu, nempè eorum ve­
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              locitates ſucceſſiuè augentur, & poſtea ad æquabi­
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              litatem reducuntur: in illo ergo exiguo tempore iņ
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              quo
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              velocitates à quiete ſucceſſiuè
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              ,
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              ſi progreſſus incrementorum non differant inſigni in­
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              æqualitate, ferè
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              velocitate deſcendent, ſcilicèt
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              percurrent temporibus æqualibus penè ſpatia æqua­
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              lia; at quia leuioris corporis B impetus facilius, &
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              magis debilitatur, retunditurque, quàm impetus
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              grauioris A, igitur propè initium motus exigua dif­
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              ferentia velocitatum reperitur, non ſic in progreſſu </s>
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