Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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Cap. 8. cur
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exiguæ aqu˛
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guttæ ſupra
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aquæ
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aſcendunt.</
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<
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">ET primò conſideretur gutta pendula ex ſuperfi
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cie prona rami alicuius arboris, cuius figurą
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videtur conoidalis parabolica: reddi debet hìc cauſa
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efficiens, & formalis huius ſuſpenſionis; concipian
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tur externæ ſuperficiales particulæ huiuſmodi guttę,
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quæ viciſſim connexæ à ſuis machinulis aliquo pacto
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incuruatis ad modum arcus efficiant veluti linteum,
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vel ſaccum in eius perimetro annexum ſummitati li
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gni duri, & conſiſtentis; partes verò intermediæ gut
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tulæ ſua grauitate naturali premunt, &
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diſtrahũt
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lin
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teum, vel rete ſuperficiale, at quia energia machi
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nularum non cedit vi puſillæ grauitatis guttulæ pen
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dentis, fit vt æquatis momentis tota gutta ſuſpenſą
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hæreat. </
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PROP. CLXXVI.
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Quare globuli fluidi pendentes è filo paritèr fluido
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ſuſtineantur.
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<
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">SEcundo loco ſit pila fluida pendula ex filo pari
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tèr fluido, vt euidentiùs contingit in Saliua, &
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in alijs humoribus glutinoſis; hìc iam concipi
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debẽt
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hinc inde à filo in orbem particulæ fluidi, quæ
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excur-rẽdo
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rendo</
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deorsùm vt graues ad infimum fili ſitum, ibi
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cõ-glutinatis
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glutinatis</
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, concatenatiſque externis particulis ope
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machinularum earum efformant veluti ſacculum
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reti-cularẽ
">reti
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cularem</
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intra
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quẽ
">quem</
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tanta moles fluidi contineri poteſt,
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vt eius pondus non ſuperet robur machinularum̨
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glutinis. </
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