Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

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          <chap id="N10019">
            <p id="N14888" type="main">
              <s id="N1488A">
                <pb pagenum="153" xlink:href="005/01/161.jpg"/>
              funda circumducitur miſsile, antequam proijciatur, ad mo­
                <lb/>
              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. </s>
              <s id="N1489A">Siquidem quilibet ex ijs duobus im­
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              pulſibus, natura ſua ad
                <expan abbr="motũ">motum</expan>
              valde
                <expan abbr="diuersũ">diuersum</expan>
              videtur ordinari. </s>
            </p>
            <p id="N148A7" type="main">
              <s id="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
                <lb/>
              niſi ad motum rectum ordinari. </s>
              <s id="N148B2">Id quod obſeruatione faci­
                <lb/>
              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. </s>
              <s id="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. </s>
              <s id="N148C6">Aut certè cum corpori fune ſuſpenſo,
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              & alicubi alligato incutitur impulſus,
                <expan abbr="illudq.">illudque</expan>
              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. </s>
              <s id="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. </s>
              <s id="N148DC">Quod ſanè apertum indicium eſt,
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              abſque impedimento per impulſum impreſſum corpora
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              nonniſi rectà moueri. </s>
            </p>
            <p id="N148E3" type="main">
              <s id="N148E5">Quod ſi ignes miſsiles ſulphureo puluere artificioſiſsimè
                <lb/>
              compactos videamus huc illuc variis
                <expan abbr="tortuoſisq.">tortuoſisque</expan>
              itineribus
                <lb/>
              diſcurrere; id ex eo fit, quia ſulphureus puluis, ita eſt intra
                <lb/>
              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
                <lb/>
              diſcurrere videantur. </s>
              <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
                <lb/>
              accenſo puluere productus directè tendat, ac moueat verſus
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              eam partem in quam ſeſe dilatando confert, & qua eſt illi
                <lb/>
              additus, vt ex anguſtia elabatur, ac foris erumpat. </s>
            </p>
          </chap>
        </body>
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