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

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[111.] Problema.
[112.] Solutio.
[113.] Scholium.
[114.] Corollarium 1.
[115.] Corollarium 2.
[116.] Scholion Generale.
[117.] HYDRODYNAMICÆ SECTIO SEPTIMA. De motu aquarum per vaſa ſubmerſa, ubi exem-plis oſtenditur, quam inſigniter utile ſit princi-pium conſervationis virium vivarum, veliis in caſibus, quibus continue aliquid de illis perdi cenſendum eſt. PARS PRIMA. De deſcenſu aquarum. §. 1.
[118.] PARS SECUNDA. De aſcenſu aquarum.
[119.] Corollarium.
[120.] Scholium Generale.
[121.] EXPERIMENTA Ad ſect. ſept. referenda. Experimentum 1.
[122.] Experimentum 2.
[123.] Experimentum 3.
[124.] De iſto tubo experimentum ita ſumſi:
[125.] Experimentum 4.
[126.] Experimentum 5.
[127.] HYDRODYNAMICÆ SECTIO OCTAVA. De motu fluidorum cum homogeneorum tum hetero-geneorum per vaſa irregularis & præruptæ ſtru-cturæ, ubi ex theoria virium vivarum, quarum pars continue abſorbeatur, explicantur præcipue Phæno-mena ſingularia fluidorum, per plurima foramina trajecto-rum, præmiſsis regulis generalibus pro motibus fluido-rum ubique definiendis. §. 1.
[128.] Regula 1.
[129.] Regula 2.
[130.] Problema.
[131.] Solutio.
[132.] Scholium 1.
[133.] Scholium 2.
[134.] Corollarium.
[135.] EXPERIMENTA Ad ſectionem octavam pertinentia. Experimentum 1.
[136.] Experimentum 2.
[137.] HYDRODYNAMICÆ SECTIO NONA. De motu fluidorum, quæ non proprio pondere, ſed potentia aliena ejiciuntur, ubi præſertim de Machinis Hydraulicis earundemque ultimo qui da-ri poteſt perfectionis gradu, & quomodo mecha-nica tam ſolidorum quam fluidorum ulterius perſici poſsit. §. 1.
[138.] Definitiones.
[139.] (A) De machinis aquas cum impetu in altum projicientibus. Regula 1.
[140.] Demonſtratio.
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119105SECTIO QUINTA. log. [1 - (1 - c{n3 - nmm/mmN} x)] = log. {1/2}c{n3 - nmm/mmN} x = {n3 - nmm/mmN} x - log. 2@
ſubſtitutiones ſi recte fiant, erit pro primo quem finximus affuſio-
nis
modo
(I) t = {γmN/n√(mm - nn) a} X (2 log.
2 + {mmn - n3/mmN} x)
quæ
poſito rurſus m = dat pro altero caſu
(II) t = {γN/n√a} X (2.
log. 2 + {n/N} x).
§. 16. Quum convertimus æquationes inventas, obtinemus
(I) x = {2mmN/mmn - n3} - [log.
(1 + c{-t/α}) - log. 2 + {t/}], &
(II) x = {2N/n} X [log.
(1 + c{-t/β}) - log. 2 + {t/}]
ubi
α, ut ſupra, = {-γmN/n√(mm - nn)a} &
β = {-γN/n√a}.
Si præterea, ut in proximo Corollario, ponatur t = , evaneſcit
unitas
præ quantitatibus, exponentialibus, quæ ſupra omnem ordinem infinitæ
ſunt
, &
fit log. (1 + c{-t/α}) = -{t/α} atque log. (1 + c{-t/β}) = -{t/β}:
unde tunc erit reſumtis valoribus litterarum α & β.
(I) x = {mt√a/γ√(mm - nn)} - {2mmN/mmn - n3} log.
2. &
(II) x = {t√a/γ} - {2N/n} log.
2.

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