Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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& Cochleæ fœmina vulgò appellatur. </
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<
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">Nam ad conuerſio
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nem manubrij totiuſque cylindri ſuper proprium axem,
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mouebitur etiam ipſum Tylum CD. </
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<
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">Quæ omnia fusè Gui
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dus Vbaldus demonſtrat. </
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">Ex cuius doctrina illud tandem
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hic relinquitur adnotandum, ac ſimul in propoſito conclu
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dendum, Cochleæ helices, aliud non eſſe, quàm latus
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cunei circa idem cylindrum iterum atque iterum circumuo
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lutum. </
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<
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">Vnde apparet quomodo etiam cochlea reducatur
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ad vectem; nimirum eodem prorſus pacto, quo cuneus, vt
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latius ipſe proſequitur. </
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De Centro grauitatis
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naturaliq.
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mobilitate
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grauium, & leuium.
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<
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">Poſt conſiderationem inſtrumentorum, ac machinarum
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circuli naturam participantium, vt aptam ac debitam
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eorum applicationem ad motum
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abbr
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grauiũ
">grauium</
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, & leuium cogno
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ſcamus, conſideranda nobis erit mobilitas ipſa tàm natu
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ralis, quàm præternaturalis, & artificioſa illorum, cui ada
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ptari debent inſtrumenta, & ad quam ex inſtituto ordinan
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tur. </
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<
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id
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">Cumque naturalis mobilitas grauium ſit penes cen
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trum grauitatis illorum, aliquid primò dicendum occurrit
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de centro grauitatis in communi, vt quàm breuiſſimè quæ
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neceſſaria ſunt ad intelligentiam præfatæ motionis expe
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diantur. </
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Centrum igitur grauitatis vniuſcuiuſque corporis iuxta
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doctrinam Heronis, ac Pappi Alexandrini, eſt punctum il
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lud intra poſitum, à quo ſi ipſum corpus graue ſuſpendatur,
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vel etiam ſuſpenſum feratur,
<
expan
abbr
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eãdem
">eandem</
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ſemper ſuarum partium
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ſeruat poſitionem quippe quæ in ipſa ſuſpenſione, aut latio
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ne corporis minimè circumuertuntur, cum vndique ſint
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æqualium momentorum. </
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<
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">Quod præclarè explicat Federi
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cus Commandinus. </
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<
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