Schott, Gaspar, Mechanica hydraulico-pneumatica. Pars I. Mechanicae Hydraulico-pnevmaticae Theoriam continet. , 1657

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1terraneum P. Athanaſij Kircheri, ubi in Libro Centroſophico
fuſiſſimè pertractat hanc materiam.
Lege præterea Joannem
Caramuelem in Cruce Sublimium ingeniorum.
Lex II. gra­
vium de­
ſcendentium
.
Numeri pa­
riter impa­
res ab unita­
te numera­
ti.
TemporaQuadrataSpatia1112433954167525963611
Leges aquæ naturali motu deſcendentis
& effluentis per tubos.
SIt jam tubus ABCD, ſive ſemper, ſive non ſemper plenus,

cujus foramen B; tempuſque in quo aqua ab A deſcendit
uſque ad B, dividatur in quinque æquales partes, in quarum
prima confecerit ſpatium A1; Dico, eandem aquam in ſe­
cunda parte temporis conficere ſpatium A4, in tertia parte

A9, in quarta ſpatium A16, in quinta ſpatium A25;
atque adeo ſpatia æqualibus quinque temporibus
confecta, habere ſe ut quadrata quinque illorum
temporum, ut ex appoſitis utrimque numeris ap­
paret; ſeu velocitatem deſcenſus aquæ creſcere ſe­
cundùm progreſſionem numerorum imparium,
prout indicant numeri intra tubum notati; ſeu
ſpatia confecta habere duplicatam rationem illius,
quam habent tempora, ut apparet ſi conferas nu­
meros externos lateris AB, cum numeris lateris
CD.
Ratio eſt, quia aqua gravis eſt, & intra tu­
bum naturali motu deſcendit, nullumque adeſt
impedimentum motus; ergo imitari debet leges aliorum gra­
vium naturali motu deſcendentium.
Leges aqua
naturali
motu de­
ſcendentis
per tubos.
50[Figure 50]
Corollarium I.
COlligitur hinc primò, Aquam è foramine B, tubi ſemper

pleni, effluere tantâ velocitate, quantâ deſcendit ab A ad
B.
Ratio eſt, quia ut ſupponitur, tantum effluit per B, quan­
tum influit per A, & è contrario tantum per A influit, quan­
tum per B effluit, & in deſcenſu ab A ad B nulla fit inter­
ruptio; ergo tam velociter effluit per B, quàm velociter de­
ſcendit ab A ad B.

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