Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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quæ à circulo mouentur, licet planitiem abſide non contingat,
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ſed aut iuxta planitiem, aut ueluti trochleæ. </
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<
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id
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">Etenim hoc ſe
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habentes modo facillimè mouentur, & onera commouent. </
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<
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id
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N13E82
">An
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quia parua ſui portione cùm tangit, tum offenſat circulus, ſed
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aliam ob cauſam? </
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<
s
id
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N13E89
">ea autem eſt, quæ dicta est prius, quod circu
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lus ſcilicet ex duabus effectus eſt lationibus: quamobrem il
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larum alteram pro nutu ſemper habet, & veluti continuò mo
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tum illum moueat quicumque mouent, quando ſecundum cir
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cumferentiam illum mouerint: latam enim ipſam mouent.
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</
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<
s
id
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">Eam quidem igitur, quæ in obliquum eſt, motionem, ipſum
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impellit mouens: ſecundum verò illam, quæ ſuper diametrum
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est, ſe ipſum mouet circulus.
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<
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">COMMENTARIVS.</
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<
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">Vt quæſtioni reſpondeat Ariſtoteles cur corpora,
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quæ rotundam, aut orbiculatam figuram obtinent,
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ſecundum illam facilius moueantur, triplicem mo
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dum diſtinguit, quo ipſa moueri rotando contingit. </
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<
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abbr
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Pri-mumq.
">Pri
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mumque</
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>
eſſe docet, quo ſecundum abſidem, ſeu extimam ip
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sorum curuaturam cientur, moto ſimul etiam centro, vt
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plauſtrorum rotæ, quæ ſimul cum axe feruntur. </
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<
s
id
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N13EBB
">Secundum
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verò modum, ait eſſe illum, quo circularia ipſa corpora re
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cta quidem ſtantia, ſeu rectè ad horizontem conſtituta mo
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uentur circa centrum immotum; veluti ſtantes trochlea
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rum rotulæ, quæ circa manentem axem, ſeu centrum ad di
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uerſos vſus conuertuntur. </
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<
s
id
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">Tertium denique modum eſſe
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inquit, quo circa immotum pariter centrum mouentur, non
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tamen ſtando, ſed quaſi proſtrata iuxta planitiem ſoli, aut
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pauimenti horizonti paralellam; ſicut rota figuli, quæ ad
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impulſum pedis illius conuertitur, ac circumagitur ſupra
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axim pauimento perpendiculariter affixum, ſeruando ſem
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per eandem diſtantiam ab horizonte. </
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<
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type
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<
s
id
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N13ED9
">Loquendo itaque de primo modo, pluribus ex cauſis, ait
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Ariſtoteles præfata corpora celerius, ac facilius moueri
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quàm illa, quæ rectilineas adepta ſunt figuras, ſeu rectilineis
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figuris terminantur, vt triangulari, vel quadrangulari, pirami-</
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