Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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<
chap
id
="
N10019
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<
p
id
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N12790
"
type
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main
">
<
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N12792
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<
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pagenum
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82
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xlink:href
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005/01/090.jpg
"/>
illius ad depreſſionem alterius,
<
expan
abbr
="
cauſaq.
">cauſaque</
expan
>
depreſſionis remo
<
lb
/>
ueatur, ſtatim pars illa eleuata præcipiti curſu deſcendat,
<
lb
/>
<
expan
abbr
="
redeatq.
">redeatque</
expan
>
in priſtinum locum. </
s
>
<
s
id
="
N127A9
">Siquidem exceſſus ille partis
<
lb
/>
eleuatæ, quem ex Ariſtotele explicuimus,
<
expan
abbr
="
rurſumq.
">rurſumque</
expan
>
ratio
<
lb
/>
centri grauitatis prædicta non videntur ſufficere, nec tanti
<
lb
/>
eſſe momenti, vt
<
expan
abbr
="
tantã
">tantam</
expan
>
motionem
<
expan
abbr
="
tamquã
">tamquam</
expan
>
præcipitem de
<
lb
/>
ſcenſum cauſare præualeant. </
s
>
<
s
id
="
N127C0
">Cum & centrum grauitatis
<
lb
/>
parum, aut imperceptibiliter remoueatur à linea illa ca
<
lb
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dente ab axe ad centrum mundi; & exceſſus partis eleuatæ
<
lb
/>
non modo paruus ſit, ſed paruum etiam ab eadem linea di
<
lb
/>
ſtet vbi minus præponderantia experitur. </
s
>
<
s
id
="
N127CB
">Etenim ſi huiuſ
<
lb
/>
modi exceſſus appenderetur tanquam onus in libra, quæ in
<
lb
/>
æquilibrio ſit conſtituta, ac prope axem in ſimili ſitu, ac eſt
<
lb
/>
ille, quem in caſu noſtro retinet, abſque dubio parum, aut
<
lb
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nihil præponderaret brachium in quo appenderetur. </
s
>
</
p
>
<
p
id
="
N127D6
"
type
="
main
">
<
s
id
="
N127D8
">Dicendum ergo eſt vltra cauſas prædictas præcipuè de
<
lb
/>
ſcenſionem illam cauſari à maiori grauitate, quam eleuatæ,
<
lb
/>
ac pondus lancis ab illo pendentis obtinere videtur in eo
<
lb
/>
loco. </
s
>
<
s
id
="
N127E1
">Nam licet in æquilibrio lances conſtitutæ, ſupponan
<
lb
/>
tur in grauitate æquales: non tamen in quocumque ſitu, &
<
lb
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poſitione, æque poſſunt grauitare. </
s
>
<
s
id
="
N127E8
">Quodlibet enim libran
<
lb
/>
dum pondus alias inuariatum, quantò magis elongatur à li
<
lb
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nea perpendiculari, quæ per punctum axis inſtrumenti ca
<
lb
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dit ad centrum terræ (quam lineam Geometrici vocant ca
<
lb
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thectum) tanto magis grauitat, vt cernere eſt in ſtatera,
<
lb
/>
vel in alio ſimili ad ponderandum apto inſtrumento. </
s
>
<
s
id
="
N127F5
">Non
<
lb
/>
quia ratione ſitus re vera maiorem, aut minorem grauita
<
lb
/>
tem acquirat, ſed quia magis, vel minus ſuſtinetur ab in
<
lb
/>
ſtrumento in illo ſitu iuxta maiorem, aut minorem propin
<
lb
/>
quitatem, quam ſitus habet cum linea explicata, vt Guido
<
lb
/>
Vbaldus animaduertit, tractatu de Libra, prop. 4. ante med.
<
lb
/>
</
s
>
<
s
id
="
N12803
">Cum igitur pondus ſuperioris lancis in eo loco magis diſtet
<
lb
/>
aliena perpendiculari prædicta, quàm pondus inferioris, ſe
<
lb
/>
quitur magis grauitare ſuperiorem lancem, quàm grauitet
<
lb
/>
inferior, atque adeo hæc ab illa tanquam ab inæquali pro
<
lb
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portione virtutis moueri, & ſurſum ferri vſquequo ad æqua-</
s
>
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