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

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              Cap. 11. gra­
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              uia iu 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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              Qua ratione motus grauium à medijs fluidis plenis inæqua­
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              litèr veloces reddantur.
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              CAP. XI.
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              <s id="s.002379">POſtquam oſtenſum eſt corpora omnia grauia ex
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              ſui natura æquè velocia eſſe, reſtat modò vt in­
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              quiramus quomodò, & quare grauia, quæ in medijs
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              fluidis mouentur, habent velocitates inæquales;
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              phyſices, & mechanices partem hactenus
                <expan abbr="deſideratã">deſideratam</expan>
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              pro viribus ſupplere tentabimus. </s>
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              PROP. CCXIV.
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              Fluida homogenoa è fistulis æquè latis, & perpendiculari­
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              tèr erectis ad horizontem fluunt velocitatibus in ſubdu­
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              plicata proportione longitudinum fiſtularum, ſi tamen
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              ſemper fiſtulæ repletæ ſint eodem fluido.
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              <s id="s.002382">ET priùs neceſsè eſt obſeruare, atque examina­
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              re qua ratione, & quibus velocitatibus fluidą
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              in fiſtulis, ſeù ſiphonibus moueantur. </s>
              <s id="s.002383">Si enim ſuman­
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              tur duæ fiſtulæ, quarum cauitates, & orificia æqua­
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              lia ſint, & in ambabus continenter repletis fluidum̨
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              idem exeat aqua v.g. dum fiſtulæ erectæ ad planum̨
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              horizontale ſunt in quo orificia exiſtunt; tunc ex v­
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              troque orificio defluunt aquæ moles, temporibus æ­
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              qualibus,
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              in
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              proportione, quam habent alti­
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              tudines, vt experientia docet, ſed in ſubduplicatą,
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              nempè ſi altitudo longioris fiſtulæ quadrupla fuerit </s>
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