Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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23
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xlink:href
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010/01/031.jpg
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libra imaginaria HI, quia hæc duo corpora motibus
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contrarijs agitantur ſuſpendunturque ab eadem li
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bra horizontali: nec actionem eorumdem corporum
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impediunt, vel adiuuant ſupremæ, vel infimæ aquæ
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partes; quando quidem aqua AB,
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æquilibratur collaterali AG cùm̨
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ſint homogeneæ & æquè altæ, non
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ſecùs infimæ aquæ partes CD & F
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E inter ſe æquilibrantur; quare ac
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tioni compreſſiuæ mercurij CB,
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expan
abbr
="
tã-tummodo
">tan
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tummodo</
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>
contraponitur pondus
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aquæ FG in eodem ſitu horizontali
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conſtitutæ. </
s
>
<
s
id
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">fiat iam vt pondus mer
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curij CB ad grauitatem aquæ FG
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ita reciprocè diſtantia IM ad MH,
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quare punctum M erit centrum gra
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uitatis duorum corporum BC, & GF, cùmque librą
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imaginaria HI fulciatur in puncto L rectæ LK per
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pendiculariter horizonti eductæ ex infimo ſitu fiſtu
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læ, vbi bifariam libra, & magnitudines fluidæ
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expan
abbr
="
ſecã-tur
">ſecan
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tur</
expan
>
, igitur conſtituitur fune-pendulum LM, & proin
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dè, iuxtà leges mechanices, libra flectetur
<
expan
abbr
="
deſcendẽ-do
">deſcenden
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do</
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corpus BC, & aſcendendo aquam FG, & hoc per
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ficitur propterea quòd centrum communis grauita
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tis M neceſſariò labitur deorſum iuxta penduli na
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/>
turam. </
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>
<
s
id
="
s.000120
">ſed prædictus motus centri grauitatis M non
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/>
eſt circularis, ſed eſt directus ad horizontem
<
expan
abbr
="
perpẽ-dicularis
">perpen
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lb
/>
dicularis</
expan
>
, per lineam MQ
<
expan
abbr
="
nõ
">non</
expan
>
ſecùs ac in trochlea
<
expan
abbr
="
cõ-tingit
">con
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tingit</
expan
>
vt dictum eſt; huius operationis verò progreſ-</
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