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

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201187SECTIO NONA.
Exemplum præcedentis regulæ deſumam à cochlea, qualem Vitruvius ad-
hibere
&
conſtruere docet. Facit autem angulum s a o ſemirectum & ſic
m
= M = {1/2} = o, 70710:
deinde inter N G & M G rationem ſtatuit,
quæ
eſt ut 3 ad 4;
inde deducitur angulus G N M vel a M H = 530, 81, ejus-
que
ſinus n = o, 80000 atque conſinus N = o, 60000:
ergo (per art. III.)
eſt ſinus arcus a g altiſſimum punctum o definientis = {m N/M n} = {3/4}, ipſeque
arcus
a g = 480, 351.
Debet adeoque vi regulæ art. VII. arcus extra aquam
eminens
in fundo eſſe 970, 101;
immergeturque arcus 2620, 501.

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