Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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<
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tur admiſti. </
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<
s
id
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N14C4C
">De ijs igitur hic loquens Ariſtoteles, quærit,
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qua de cauſa rotundam potius quam aliam figuram per at
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tritionem ac perpetuam illam agitationem adipiſcantur,
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cum frequentius ex lapidibus, ac fragmentis alterius figuræ
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efficiantur. </
s
>
<
s
id
="
N14C57
">Quod enim ſecundum omnes ſui partes paula
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tim conteritur, ac minuitur, vniformiter difformiter contun
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di debet, ac ſenſim attenuari, eadem partium proportione
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ſeruata,
<
expan
abbr
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eademq.
">eademque</
expan
>
proinde figura. </
s
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<
s
id
="
N14C64
">Non igitur ſatis apparet
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cur ex tot tanquam ex diuerſis figuris teſtarum oſtreorum
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lb
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<
expan
abbr
="
concarumq.
">concarumque</
expan
>
ac lapidum angularium non niſi rotundam, &
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lb
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orbicularem formam eorum reliquiæ videantur ſeruare,
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<
expan
abbr
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eiuſdemq.
">eiuſdemque</
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>
figuræ penè omnes euadant cuius non erant. </
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</
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<
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type
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<
s
id
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N14C77
">Huic autem quæſtioni Ariſtoteles reſpondet, partes, quæ
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magis à centro, ſeu puncto medio circumlati corporis rece
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dunt, cum celerius in eius circumuolutione ferantur (maius
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videlicet in æquali tempore ſpatium in rotatione conficien
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do) vehementius impetere,
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expan
abbr
="
vicinaq.
">vicinaque</
expan
>
corpora rotando per
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cutere, quàm partes centro propinquiores; velocitas enim
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lb
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auget impulſum: Quæ autem partes
<
expan
abbr
="
vehemẽtius
">vehementius</
expan
>
impetunt,
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lb
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atque impingunt, ſi fragiles in ſe ſint, facilius etiam refran
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guntur. </
s
>
<
s
id
="
N14C92
">Cum igitur prominentiores partes crocearum ſint
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huiuſmodi, vt celerius in ſuos orbes ruant, vehementiuſque
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propterea illidant, ſequitur facilius ipſas contundi,
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expan
abbr
="
ſolumq.
">ſolumque</
expan
>
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propterea relinqui partes à centro æquidiſtantes, ex quibus
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reſultat orbicularis, ac rotunda figura, quam in ipſis croceis
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communiter cernimus. </
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<
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">Quod ſi ex hoc Ariſtotelis diſcurſu ſequatur maiores
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croceas rotundiores fieri, quàm minores propter maiorem
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à centro diſtantiam, qua in rotatione prominentes partes
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facilius contunduntur; id certè ab experientia non eſt om
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nino alienum, vt Baldus arbitratur; ſicut nec ipſas croceas
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lb
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circa centrum conuerti, quamuis alijs, ac diuerſis etiam mo
<
lb
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tionibus agitentur. </
s
>
<
s
id
="
N14CB4
">Si enim in pluribus littoribus attentius
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obſeruaſſet, vidiſſet vtique fluctuum iactatione fluxu, ac re
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fluxu, non modo glareas, paruoſque lapillos circa centrum
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omnino conuolui, ſed etiam maiores vmbilicos, & non me</
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