Bernoulli, Daniel
,
Hydrodynamica, sive De viribus et motibus fluidorum commentarii
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cum per longiſſimos rivos aut aquæductus feruntur, magnoque lumine eji-
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ciuntur; </
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<
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quod ſingulari exemplo ex Cl. </
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f
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irmatur. </
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læ dantur, quarum ope vel ex fluxus tempore vel ex quantitate aquarum e-
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jectarum velocitas ſingulis temporis punctis definiri poſſit & </
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">In ſequentibus fluida conſiderantur, quæ intra vaſa moventur,
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@bi præſertim motus fluidorum reciproci ſeu oſcillatorii ad menſuras revocan-
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tur, earumque affectiones indicantur. </
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<
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pro oſcillationibus fluidi, in tubo uniformis amplitudinis (cujus crura duo ex-
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trema verticalia, intermedia pars horizontalis) oſcillantis, quod Theorema
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Pater meus in Comm. </
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poſita inclinatione qualicunque crurum extremorum verſus horizontem. </
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ftra Theoria totam rem ſine ulla reſtrictione complectitur, tubos conſiderans
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in ſingulis locis directione ſeu poſitione atque amplitudine pro lubitu variabi-
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les: </
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">oſtenditur dein, quibus in caſibus fiat, ut oſcillationes diverſæ excurſionis
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ſ
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int Iſochronæ, quibus ſtantibus longitudo penduli ſimplicis Iſochroni gene-
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raliſſime determinatur. </
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ſectione quædam aliæ examini ſubjiciuntur, veluti illæ, quæ fiunt in tubis a-
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quæ infinitæ vel etiam terminatæ immerſis, in quibus ſingulari circumſpectio-
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ne opus eſt, qua adhibita omnia phænomena calculo ad amuſſim reſpondent,
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eadem vero neglecta tantus fit inter ea diſſenſus, quantus eſt inter leges mo-
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tus, quæ pro corporibus perfecte elaſticis, iisque quæ pro mollibus valent.</
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dorum conſiderans ſive homogeneorum ſive heterogeneorum, quæ per unum
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aut plura foramina transfluere coguntur, priuſquam ejiciantur in aërem, ubi
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regula illa communiter recepta de ſaltu aquæ ad ſupremam aquæ libellam ve-
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liementer fallit, ceſſantibus etiam legibus preſſionis ordinariis. </
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omnium apud Authores ne veſtigium quidem reperitur, niſi quod Mariottus
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habet, loco ſupra citato part. </
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<
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aquarum retardari, fuiſſe ſe experientia edoctum, teſtatur, ſimul autem ma-
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nifeſtat, quam procul abfuerit a vera horum motuum Theoria, & </
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hæc Theoria omnium fere principiorum, adhuc in rebus ſimilibus adhiberi ſo-
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litorum, vim eludere, ita ut nihil ſit, quod noſtrorum præſtantiam magis </
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