Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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cea inſumere debet duo minuta ſecunda tantùm, quę
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varietas pendere videtur ex eo, quod velocitates
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fuerunt à Merſenno obſeruatæ in valdè prolixo ſpa
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tio, vbi medij conſiſtentia, & gluten valdè
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alterãt
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, &
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augẽt
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inæqualitates velocitatum, quæ ſi propè ini
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tium motus obſeruatæ fuiſſent, procùl dubio non ha
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buiſſent quintuplam, ſed tantummodò duplam pro
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portionem. </
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Hydraul.
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fol. 116.</
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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.</
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<
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id
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">Hinc quoque deducitur imperitia eorum, qui dum
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experiri volunt, an corpora inęqualiter grauia
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abbr
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deſcẽ-dant
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dant</
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inæqualibus velocitatibus, putant hoc fieri de
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bere non in exiguis, ſed in prolixis deſcenſibus, &
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ideò obſeruant inæqualitates velocitatum corporum
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in aere deſcendentium ab altiſſimis turribus vbi ve
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locitates plumbi, & argillæ valdè differunt inter ſe,
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cùm tamen in breuioribus altitudinibus nullo ſenſu
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diſtingui poſſint
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abbr
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eorũ
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inæqualitates, cùm ambo
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eodẽ
">eodem</
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tempore ferri videantur. </
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<
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">Et antequam vlterius pro
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cedamus, afferemus duas experientias contra negan
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tes motum acceleratum ſolidorum corporum intra a
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quam; & primò in deſcenſu pilam plumbeam feta e
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quina ſuſpendi,
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habẽtem
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infernè
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acũ
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abbr
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infixã
">infixam</
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, eamque
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demiſi intra aquam in diuerſis altitudinibus à fundo
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cera incruſtato,
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tũc
">tunc</
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vidi acum profundius ceram pe
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netrare quò à ſublimiori altitudine pila decidebat.
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</
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<
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">in aſcenſu verò ſumpſi leuiſſimum calamum
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anſerinũ
">anſerinum</
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>
,
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eiuſque infimum orificium fruſto plumbi perfectè
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obturaui, atque bacillo demerſi calamum directè in
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fra aquam, in maiori tamen profunditate, quàm eius </
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