Bernoulli, Daniel, Hydrodynamica, sive De viribus et motibus fluidorum commentarii

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Jam igitur apparet aſcenſum potent. aquæ ante effluxum guttulæ eſſe =
quartæ
proportionali ad ſpatium D C I P L, ſpatium D T U L &
altitudi-
nem
qs, eundemque poſt effluxum guttulæ eſſe = quartæ proportionali
ad
ſpat.
FEIPNOL, ſpat. FWUXYOL & altit. qz: ſunt autem in utra-
que
analogia termini primi (nempe ſpat.
DCIPL & ſpat. FEIPNOL) in-
ter
ſe æquales, igitur ſi quodvis horum ſpatiorum indicetur per M, ſpa-
tium
D T U L per N, ſpat FWUXYOL per N + dN, altitudo qs per
v
&
qz per v + dv, erit incrementum aſcenſus potentialis durante guttulæ efflu-
xu
= {Ndv + vdN/M}.
Quod ſi nunc ponatur L D = x, F D = - dx, D C
= y, H G = m, P L = n, erit D T = {mm/y}, L X = {mm/n}, L O = {-ydx/n}
(quia ſpatium D F E C = ſpatio L O N P), hincque dN = L O Y X -
D
F W T = - {mmydx/nn} + {mmdx/y}, unde nunc incrementum quæſitum
aſcenſus
petentialis eſt = (Ndv - {mmvydx/nn} + {mmvdx/y}):
M. Q. E. I.

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