Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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chap
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type
="
main
">
<
s
id
="
s.000118
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<
pb
pagenum
="
23
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xlink:href
="
010/01/031.jpg
"/>
<
arrow.to.target
n
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marg23
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<
lb
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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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<
figure
id
="
id.010.01.031.1.jpg
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xlink:href
="
010/01/031/1.jpg
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number
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12
"/>
<
lb
/>
æquilibratur collaterali AG cùm̨
<
lb
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ſint homogeneæ & æquè altæ, non
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ſecùs infimæ aquæ partes CD & F
<
lb
/>
E inter ſe æquilibrantur; quare ac
<
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tioni compreſſiuæ mercurij CB,
<
expan
abbr
="
tã-tummodo
">tan
<
lb
/>
tummodo</
expan
>
contraponitur pondus
<
lb
/>
aquæ FG in eodem ſitu horizontali
<
lb
/>
conſtitutæ. </
s
>
<
s
id
="
s.000119
">fiat iam vt pondus mer
<
lb
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curij CB ad grauitatem aquæ FG
<
lb
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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
<
lb
/>
pendiculariter horizonti eductæ ex infimo ſitu fiſtu
<
lb
/>
læ, vbi bifariam libra, & magnitudines fluidæ
<
expan
abbr
="
ſecã-tur
">ſecan
<
lb
/>
tur</
expan
>
, igitur conſtituitur fune-pendulum LM, & proin
<
lb
/>
dè, iuxtà leges mechanices, libra flectetur
<
expan
abbr
="
deſcendẽ-do
">deſcenden
<
lb
/>
do</
expan
>
corpus BC, & aſcendendo aquam FG, & hoc per
<
lb
/>
ficitur propterea quòd centrum communis grauita
<
lb
/>
tis M neceſſariò labitur deorſum iuxta penduli na
<
lb
/>
turam. </
s
>
<
s
id
="
s.000120
">ſed prædictus motus centri grauitatis M non
<
lb
/>
eſt circularis, ſed eſt directus ad horizontem
<
expan
abbr
="
perpẽ-dicularis
">perpen
<
lb
/>
dicularis</
expan
>
, per lineam MQ
<
expan
abbr
="
nõ
">non</
expan
>
ſecùs ac in trochlea
<
expan
abbr
="
cõ-tingit
">con
<
lb
/>
tingit</
expan
>
vt dictum eſt; huius operationis verò progreſ-</
s
>
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</
text
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