Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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<
chap
id
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N10019
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N13ED7
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main
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<
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pagenum
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131
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005/01/139.jpg
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des, & cubi. </
s
>
<
s
id
="
N13EE7
">Prima eſt, quia minima ſui parte planum con
<
lb
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tingunt hoc eſt minori, quam cuiuſlibet alterius figuræ cor
<
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pora, reſpectu, verbi gratia ſphæræ, quæ planum tangit in
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puncto. </
s
>
<
s
id
="
N13EF0
">Secunda verò eſt, quia hoc pacto non offendunt, aut
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impingunt niſi ſcilicet rarius, ac difficilius; A terra enim ſe
<
lb
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motus eſt angulus, inquit Ariſtoteles, nimirum angulum
<
lb
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contingentiæ, ſeu contactus, quia poſt punctum contingen
<
lb
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tiæ, totum latus curuilineum ipſorum corporum orbicula
<
lb
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rium, quod cum plano conſtituit huiuſmodi angulum, è ter
<
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ra eleuatur; ac propterea minus impingunt in offendicula,
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quàm alia corpora, quorum latera
<
expan
abbr
="
nõ
">non</
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ſtatim poſt minimum
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contactum eleuantur, ſed ipſi plano, ſeu terræ adhærent.
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</
s
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<
s
id
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N13F08
">Tertia cauſa eſt, nam huiuſmodi corpora cuicunque ob
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uient offendiculo, illud pariter nonniſi ſecundum puſillam
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lb
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ſui partem attingunt, eadem ratione, qua planum, ſeu ſolum
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ſuper quod ipſa mouentur, ſecus, ac rectilineam figuram ha
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bentia, quæ ſemper ſua rectitudine ſecundum magnam, vel
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ſaltem maiorem partem contingunt. </
s
>
</
p
>
<
p
id
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type
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main
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<
s
id
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">Ad hæc quartam cauſam addit Ariſtoteles. </
s
>
<
s
id
="
N13F1B
">Nam (inquit)
<
lb
/>
quò nutat pondus, eo motor mouet. </
s
>
<
s
id
="
N13F20
">Hoc eſt, quia motor
<
lb
/>
dum huiuſmodi corpora rotunda, vel ſphærica ſecundum
<
lb
/>
abſidem mouet, eo profectò impellit, quo ſtatim ipſorum
<
lb
/>
pondus propendit ſiue inclinat. </
s
>
<
s
id
="
N13F29
">Etenim ſi conſtituatur ſu
<
lb
/>
per planum AB horizonti
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lb
/>
<
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<
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paralellum erecta aliqua
<
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rota, vt CDEF tanquam
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circulus, eius diameter à
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contactu plani vbi C per
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pendiculariter ad angulos
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rectos per centrum ſupra
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traſcendens ad D, totam
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rotam eiuſque pondus in
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duas partes æquales diſtri
<
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/>
buet, nempe in DFC, &
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DEC.
<
expan
abbr
="
Eritq.
">Eritque</
expan
>
ipſa rota in </
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>
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</
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