Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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rectà IM parallela funibus, ſeu perpendicularis ad
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horizontem ſecans KL in M planè ſectæ erunt duæ li
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bræ prædictæ in I, & M in eadem proportione reci
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proca ponderum ſuſpenſorum, ideoque puncta I, &
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M erunt centra grauitatum vtriuſque libræ: quare li
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cet pondus B aſcendat p BL, tamen verum eſt duo
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pondera AB in communi centro grauitatis I ſuſpenſa
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circa centrum firmum G, & in termino fune-penduli
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GI deſcendere directo motu, & perpendiculari ad
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horizontem per IM, & hoc erat oſtendendum. </
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Cap. 2. dę
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momentis
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grauium in
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fluido inna
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tantium</
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Cap. 2. dę
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momentis
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grauium in
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fluido inna
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tantium</
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">Huiuſmodi mechanicæ ſpeculationes maximè
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ferunt</
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ad intelligentiam motus corporum in fluidis,
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pro cuius declaratione primò conſiderari debet. </
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PROP. VIII.
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Qua ratione fiat Motus fluidi in ſiphone continuato,
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& in ſeipſum reflexo.
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">SIt igitur ſipho ABDG in ſe ipſum reflexus cuius
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brachia lateralia BN & GO directa ſint, in
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ter ſe parallela, & ad horizontem perpendiculariter
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erecta & æquè ampla. </
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mercurij BC, quæ in fiſtulis anguſtis retinetur in eo
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dem ſitu collecta, reliqua verò cauitas eiuſdem fiſtulæ
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BAGDC repleatur aqua; tunc ductis à punctis B, &
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C & à
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grauitatis guttæ mercurialis H tribus li
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neis rectis parallelis horizonti BG, HI, & CF, & ſec
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ta HI bifariàm in L; patet quòd duo grauia, mercu
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rius nempe BC, & aqua GF ſuſpenduntur in eadem̨ </
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