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

Table of figures

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              FBAG, quæ æqualibus motibus inter ſe contrarijs
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              mouentur, tantumdem enim ſolidum aſcendit, quan­
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              tum aqua collateralis deprimi­
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              tur: & ſiquidem ſolidum eiuſ­
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              dem grauitatis ſpecificæ, ac a­
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              qua fuerit, tunc perindè eſt ac
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              ſi portio aquea FBAG eſſet e­
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              iuſdem ſubſtantiæ, ac lignum̨
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              BEQA, vel è contrà lignum eſ­
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              ſet aqua, & tunc patet, quod
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              centrum grauitatis aggregati
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              ex ligno, & aqua collaterali ei
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              æquali inſiſtet præcisè perpen­
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              dicularitèr ſuper libræ centrum, ſeu fulcimentum B,
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              & ideò nulla ratio ſuadet, quod prædictum æquili­
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              brium alteretur, & proindè neque lignum aſcendet,
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              neque aqua deprimetur, vel è contrà, ſed in
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              ſi­
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              tu intra fluidum fixè perſiſtet. </s>
              <s id="s.002466">Si verò lignum minùs
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              graue ſpecie fuerit, quam aqua collateralis, tunc
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              patet, quod centrum communis grauitatis ſolidi, &
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              fluidi non inſiſtet vt priùs perpendicularitèr ſuprą
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              fulcimentum B libræ ſubiectæ, ſed cadet vltra ipſum
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              versùs F, & tunc iuxtà naturam penduli libram FE
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              flectetur, vel potiùs in ſiphone aqua deſcendet, &
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              lignum eleuabitur. </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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              <s id="s.002468">Id quod dictum eſt de radio phyſico, ſeù ſe­
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              ctore FE, dicendum eſt de reliquis omnibus partibus
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              tùm aquæ ambientis, cùm cylindri lignei, vndè con­
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              ſtituuntur innumeræ libræ, ſeù potiùs libra ſuperfi-</s>
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