Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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153
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funda circumducitur miſsile, antequam proijciatur, ad mo
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tum rectum proiectionis vim ac robur adijcere poſsit; ita vt
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impetus in circumlatione acquiſitus, in impetum proie
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ctionis refundatur. </
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<
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id
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N1489A
">Siquidem quilibet ex ijs duobus im
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pulſibus, natura ſua ad
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motũ
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valde
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diuersũ
">diuersum</
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videtur ordinari. </
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N148A7
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<
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N148A9
">Sed pro ſolutione ſtabiliendum prius eſt, qualitatem im
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petus corporibus impreſſam, varios quidem motus per ac
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cidens in illis poſſe cauſare; per ſe tamen ac natura ſua non
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niſi ad motum rectum ordinari. </
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<
s
id
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N148B2
">Id quod obſeruatione faci
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lè comprobatur; Nam ſi attentè animaduertere quis velit,
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nullum inueniet impetum per quem proiectum aliter quàm
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recta tendat in terminum ſui motus: niſi fortaſſe aliqua ex
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parte repercutiatur, aut impediatur. </
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<
s
id
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N148BD
">Vt cum proiecta pila
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repercutiatur à loco in quem impulerit, ac reddere cogitur,
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vel declinando à rectitudine propter impedimentum, obli
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què vlterius pergit. </
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<
s
id
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N148C6
">Aut certè cum corpori fune ſuſpenſo,
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& alicubi alligato incutitur impulſus,
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expan
abbr
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illudq.
">illudque</
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non rectà quò
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mittitur, ſed in orbem mouetur, eo quod detineatur in cen
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tro ex quo per funem propendet. </
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<
s
id
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N148D3
">Nam ſi in eadem circum
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latione rumpatur funis, aut ſoluatur, videmus idem corpus
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recta tendere, quò verſus per vltimum arcum ſuæ circum
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uolutionis reſpiciebat. </
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<
s
id
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N148DC
">Quod ſanè apertum indicium eſt,
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abſque impedimento per impulſum impreſſum corpora
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nonniſi rectà moueri. </
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<
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id
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N148E5
">Quod ſi ignes miſsiles ſulphureo puluere artificioſiſsimè
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compactos videamus huc illuc variis
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abbr
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tortuoſisq.
">tortuoſisque</
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itineribus
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diſcurrere; id ex eo fit, quia ſulphureus puluis, ita eſt intra
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cartaceos eorum anfractus artificiosè diſpoſitus, vt accen
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ſus, diuerſis ex lateribus vim inferat, ex quibus illi in oppo
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ſita loca ferantur, ac veluti per obliquos calles ſerpendo
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diſcurrere videantur. </
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<
s
id
="
N148F8
">Quod quippe tantum arguit mixtio
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nem ipſius motus procedentem à varia ſituatione pulueris,
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ſeu cauſæ impellentis; cum alias etiam quilibet impetus ab
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accenſo puluere productus directè tendat, ac moueat verſus
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eam partem in quam ſeſe dilatando confert, & qua eſt illi
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additus, vt ex anguſtia elabatur, ac foris erumpat. </
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