Bernoulli, Daniel
,
Hydrodynamica, sive De viribus et motibus fluidorum commentarii
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HYDRODYNAMICÆ.
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catum fuit, in æquatione paragraphi decimi ponendum x = o, ſint
<
unsure
/>
ulque
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lb
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ſolus primus ſeriei terminus adhibendus rurſusque ponendum m α pro
<
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√(mmαα - 2nn); </
s
>
<
s
xml:id
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echoid-s1907
"
xml:space
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preserve
">atque ſic fit
<
lb
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t = {2mα/n}√a.</
s
>
<
s
xml:id
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echoid-s1908
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xml:space
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</
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<
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<
s
xml:id
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echoid-s1909
"
xml:space
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">Tum denique tempus, quod impenditur in deſcenſum ſuperficiei per
<
lb
/>
altitudinem a - c exprimetur in ſimili hypotheſi hac æquatione
<
lb
/>
t = {2ma/n} (√a - √c).</
s
>
<
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echoid-s1910
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xml:space
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">}</
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</
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<
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<
s
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echoid-s1911
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xml:space
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">§. </
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<
s
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echoid-s1912
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xml:space
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">14. </
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<
s
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echoid-s1913
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xml:space
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">Præmiſſæ æquationes non accurate quidem, proxime tamen
<
lb
/>
ſatisfacient, cum vas non infinitæ, permagnæ tamen amplitudinis eſt: </
s
>
<
s
xml:id
="
echoid-s1914
"
xml:space
="
preserve
">imo
<
lb
/>
non multum admodum defie
<
unsure
/>
ient, cum numerus m vel mediocriter ſuperat
<
lb
/>
numerum n. </
s
>
<
s
xml:id
="
echoid-s1915
"
xml:space
="
preserve
">Liceat quædam hic verba adjicere circa experimentum quod in
<
lb
/>
fine paragraphi undecimi indicavi, deturque hæc venia inſtituto noſtro,
<
lb
/>
quod in phænomenis motuum experientia cognitis potiſſimum verſatur il-
<
lb
/>
luſtrandis examinandisque. </
s
>
<
s
xml:id
="
echoid-s1916
"
xml:space
="
preserve
">Dixi autem in citato paragrapho cum aqua ho-
<
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rizontaliter effluit, primam guttulam totam ſtatim obtinere amplitudinem
<
lb
/>
jactus; </
s
>
<
s
xml:id
="
echoid-s1917
"
xml:space
="
preserve
">atque idem hoc quidem indicat theoria pro vaſis ampliſſimis; </
s
>
<
s
xml:id
="
echoid-s1918
"
xml:space
="
preserve
">at ve-
<
lb
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ro in vaſis mediocriter amplis, quædam guttulæ minori impetu effluere de-
<
lb
/>
berent, priusquam punctum maximæ velocitatis adſit, hæque guttulæ in-
<
lb
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cidere deberent in locum aliquem medium inter maximum jactum & </
s
>
<
s
xml:id
="
echoid-s1919
"
xml:space
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">pun-
<
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ctum, quod foramini verticaliter reſpondet; </
s
>
<
s
xml:id
="
echoid-s1920
"
xml:space
="
preserve
">atque hoc etiam ita fieri ob-
<
lb
/>
ſervavi, ex vaſis amplitudinis veluti decies foramine majoris. </
s
>
<
s
xml:id
="
echoid-s1921
"
xml:space
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preserve
">Verum cum
<
lb
/>
experimentum aliquando ſumerem de vaſe pedem dimidium alto, quod am-
<
lb
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plitudinem præter propter centuplam haberet foraminis, ne minima quidem
<
lb
/>
particula aquæ, quantum videre potui, notabiliter à jactu aquæ pleno de-
<
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fecit. </
s
>
<
s
xml:id
="
echoid-s1922
"
xml:space
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">Videamus itaque quænam aquæ quantitas in hoc caſu effluere deberet
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ante punctum maximæ velocitatis; </
s
>
<
s
xml:id
="
echoid-s1923
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xml:space
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">erit autem tanta, quantam continet cy-
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lindrus ejusdem amplitudinis in altitudine
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a - a: </
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<
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xml:space
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">({mmαα - nn/nn})
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(vid. </
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<
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">fin.)</
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<
s
xml:id
="
echoid-s1930
"
xml:space
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">nec differt fere hæc minima altitudo ab hac multo com-
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pendioſiori, nempe {2nna/mmαα} log. </
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<
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echoid-s1931
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xml:space
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">{mα/n} (vid. </
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<
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echoid-s1932
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">§. </
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<
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">11.) </
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<
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echoid-s1934
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xml:space
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">ubi nunc per {n/m} </
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