Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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uelluntur, illæ citius ac longius ab inuicem coguntur diſce
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dere, quæ magis diſtant à puncto, quod conſtituitur cen
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trum in hac motione; quia nimirum illæ diſcedendo, maio
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rem ſemper arcum deſcribunt eodem tempore, quam quæ
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propinquiores ſunt centro. </
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<
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">Illæ igitur ipſæ partes craſſitiei
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diſtantiores a centro prius, ac citius ab inuicem ſeparantur,
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ac proinde fractio non ab ipſo centro, vel parte inferiori vbi
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fulcitur, ſed à parte ſuperiori, ac remotiori ab illo, initium
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ſumere debet. </
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">Quod vt planius conſtet, eſto lignum, quod frangitur AB.
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">Centrum vbi fulcitur C,
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fracta, vel frangenda dimi
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dia AD, & EB ſemicirculum deſcribentia AFB circa
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ipſum C. </
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verò quæ ab in
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uicem ſeparan
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tur ſint illæ, quæ
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exiſtunt in lineis
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DC, & EC re
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pręſentantes la
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titudinem, vel
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craſsitiem ligni.
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</
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<
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id
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">Dicimus ergo ex
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huiuſmodi par
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tibus, quæ ſunt in ipſis lineis DC, & EC, illas quæ magis
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diſtant à puncto C citius moueri, ac per maius interuallum
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ab inuicem ſeparari: quod eſt prius confringi, quàm quæ
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propinquiores ſunt puncto C. </
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">Siquidem ipſum C non
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modo conſtituitur centrum in hac motione reſpectu ſemi
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circuli AFB; ſed etiam reſpectu ſemicirculi GDEH, qui
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efficitur à punctis DE, vt tandem DA poſt abſolutam
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complicationem ligni reperiatur in GI; & EB in HK. </
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<
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id
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propter lineæ DC, & EC conſtituuntur tanquam duo ſe
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midiametri, cuius partes quo remotiores fuerint à centro
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C, eo velocius ab eadem potentia mouentur,
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abbr
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maiusq
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ſpa
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tium in æquali tempore percurrunt, vt ſępius probatum eſt. </
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<
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