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

Table of figures

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              datat, & incrementa velocitatis eius tandem ad æqua­
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              bilitatem reduci debent.
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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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              <s id="s.002626">SIt vas NX omninò vacuum, & NZ ſit repletum a­
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              liquo fluido aereo v.g. & intelligantur particu­
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              læ temporis inter ſe æquales AB, BD, DG, GK, KN,
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              & in primo tempore AB graue deſcendens in vacuo
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              acquirat gradum impetus BC, in ſequenti verò tem­
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              pore BD præter gradum DE æqualem BC, quem iņ
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              priori tempore acquiſierat, & in eo conſeruatur, ac­
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              quiret quoque nouum gradum̨
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              impetus EF æqualem priori BC,
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              pariterque in tertio temporę
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              prioribus æquali DG, præter im­
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              petum GH ab eo acquiſitum iņ
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              tempore pręcedenti AD, acqui­
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              rit nouum gradum impetus HI
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              æqualem prioribus EF, vel BC,
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              tandem in tempore GK præter
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              gradum KL, quem prius acquiſierat, denuò ei ſuper­
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              additur nouus gradus impetus LM æqualis priori
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              BC; & hoc procùl dubio contingit ablatis omnibus
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              impedimentis in vaſe NX: at ſi motus ſolidi ſup­
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              ponatur in medio fluido NZ fieri, ibi duplici nomi­
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              ne gradus velocitatum acquirendi debilitari
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              ,
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              primò propter percuſſionem, quam mobile corpori
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              fluido inferre debet, ſecundò propter reſiſtentiam̨
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              machinularum, ſeu glutinis eiuſdem fluidi; neceſsè
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              ergo eſt, vt quilibet horum graduum impetus vtpo­
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              tè BC non perpetuò
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              integer, & illibatus, </s>
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