Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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89
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005/01/097.jpg
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E ſe habeat ad pondus D eadem proportione, qua bra
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chium CA ſe habet ad brachium CB. </
s
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<
s
id
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N12A8F
">Tunc quippe dici
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mus vectem, aut libram manſuram in æquilibrio propter
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<
expan
abbr
="
cõmutatam
">commutatam</
expan
>
proportionem. </
s
>
<
s
id
="
N12A99
">Etenim quadruplum ponderis
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D commutatur cum quadruplo longitudinis CB. </
s
>
<
s
id
="
N12A9F
">Et pon
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dus E compenſatur à longitudine CA, quæ eſt quarta.
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</
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<
s
id
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N12AA5
">pars longitudinis CB: ſicut pondus E eſt quarta pars pon
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deris D. </
s
>
<
s
id
="
N12AAB
">Quare promiſcue ſumendo partes ipſas ponde
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rantes ſiue ratione propriæ grauitatis, ſiue ratione diſtan
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lb
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tiæ quam habent à fulcimento, quinque erunt partes ad le
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uam, & quinque ad dexteram,
<
expan
abbr
="
vtræq.
">vtræque</
expan
>
vtriſque in pondere
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lb
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æquales, vel æquè ſimul grauitantes. </
s
>
<
s
id
="
N12ABA
">Siquidem nec pondus
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lb
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D, quod eſt vt quatuor: nec pondus E, quod eſt vt vnum,
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lb
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ſuperare poteſt longitudinem CA, quæ pariter eſt vt vnum.
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lb
/>
</
s
>
<
s
id
="
N12AC2
">Et ſic vnum ſupra quatuor ex vtraque parte conſtituunt
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lb
/>
quinquenarium æquale ex commutata proportione longi
<
lb
/>
tudinis, & grauitatis. </
s
>
</
p
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<
p
id
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type
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main
">
<
s
id
="
N12ACB
">Cæterum cum Ariſtoteles totam vin ſui argumenti ſum
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lb
/>
pſerit ex eo, quod ab æquali pondere celerius mouetur bra
<
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/>
chium, ſeu partem libræ, quæ magis à centro diſtenditur;
<
lb
/>
cauſam ipſam cur exiguæ vires adhibito vecte magna mo
<
lb
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ueant pondera conſtituere videtur in velocitate, quæ bra
<
lb
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chij longitudinem conſequitur, vt ait Baldus. </
s
>
<
s
id
="
N12AD9
">Quod qui
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dem ipſe minime approbat. </
s
>
<
s
id
="
N12ADE
">Quæ enim, ait, velocitas in re
<
lb
/>
ſtante? </
s
>
<
s
id
="
N12AE3
">Stant autem vectis, & libra dum manent in æquili
<
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/>
brio, & nihilominus parua potentia ingens ſuſtinet pondus. </
s
>
</
p
>
<
p
id
="
N12AE8
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type
="
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">
<
s
id
="
N12AEA
">Veruntamen ſi verba Ariſtotelis exactius penſentur non
<
lb
/>
id ſignificant, nec ille talem cauſam formaliter in maiori
<
lb
/>
velocitate, ſed in maiori grauitate, aut virtute conſtituit,
<
lb
/>
quæ brachij maiorem longitudinem conſequitur. </
s
>
<
s
id
="
N12AF3
">Etenim
<
lb
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cum dixit:
<
emph
type
="
italics
"/>
Quoniam autem ab æquali pondere celerius mo
<
lb
/>
uetur maior earum, quæ à centro ſunt.
<
emph.end
type
="
italics
"/>
</
s
>
<
s
id
="
N12AFF
"> Idem per
<
emph
type
="
italics
"/>
celerius
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emph.end
type
="
italics
"/>
ac
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per
<
emph
type
="
italics
"/>
facilius
<
emph.end
type
="
italics
"/>
intellexit. </
s
>
<
s
id
="
N12B10
">Quandoquidem paulo poſt id ipſum
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repetens, ait.
<
emph
type
="
italics
"/>
Semper autem quanto ab hypomochlio dicta
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bit magis, tanto facilius mouebit.
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emph.end
type
="
italics
"/>
</
s
>
<
s
id
="
N12B20
"> Et quidem in motu locali
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velocitas ſemper facilitatem inuoluit, aut ſupponit,
<
expan
abbr
="
ipſaq.
">ipſaque</
expan
>
</
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>
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>
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>
</
archimedes
>