Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

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          <chap id="N10019">
            <p id="N177C5" type="main">
              <s id="N177D4">
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              bet contrarietatem cum grauitate, aut leuitate, quæ ſunt
                <lb/>
              qualitates inter ſe contrariæ. </s>
              <s id="N177E4">Et confirmari adhuc poteſt,
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              quia ſi gradus aliquis grauitatis expelleretur è proiecto, id
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              fieret per introductionem ſimilis gradus leuitatis, vt gradus
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              frigoris per gradum caloris; atque adeò non per introdu­
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              ctionem qualitatis impetus, quæ indifferens eſt ad coexi­
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              ſtendum cum grauitate, aut leuitate. </s>
              <s id="N177F1">Licet
                <expan abbr="quandoq.">quandoque</expan>
              ex
                <lb/>
              prædominio impediat effectum, ſeu motum vtriuſque vel
                <lb/>
              alterutræ qualitatis oppoſitæ. </s>
              <s id="N177FC">Nam ſi dirigatur ad latera
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              per lineam horizonti paralellam, nec ſinit proiectum aſcen­
                <lb/>
              dere, nec deſcendere; ac ſurſum ferens pondera prohibet
                <lb/>
              deſcenſum, non minus ac aſcenſum leuium dum ea deorſum
                <lb/>
              deprimit. </s>
              <s id="N17807">Quod ſi
                <expan abbr="pleraq.">pleraque</expan>
              grauia nimia grauitate proijci
                <lb/>
              minimè valeant,
                <expan abbr="nullamq.">nullamque</expan>
              propterea impetus introductio­
                <lb/>
              nem, aut productionem in ſe admittant: hoc certè non pro­
                <lb/>
              uenit ex contrarietate, quam formaliter grauitas habeat
                <lb/>
              cum impetu; ſed ex repugnantia, quam dicit ad motum
                <lb/>
              præter naturalem, ac requiſitum tanquam conditionem ad
                <lb/>
              hoc vt impetus producatur, & incutiatur. </s>
              <s id="N1781E">Etenim quod mo­
                <lb/>
              neri nequit, nec poteſt impelli, & abſque impulſu, nulla fieri
                <lb/>
              valet proiectio. </s>
              <s id="N17825">Sicut contrà quantò plus, aut velociùs
                <lb/>
              graue aliquod à proijciente agitatur, tantò maiorem ab eo
                <lb/>
              impetum recipit,
                <expan abbr="longiusq.">longiusque</expan>
              proijcitur. </s>
            </p>
            <p id="N17830" type="main">
              <s id="N17832">Soluit igitur quæſtionem Ariſtoteles dicens, proiecta ex
                <lb/>
              eo à latione ceſſare, quod virtus motiua impellens, quam
                <lb/>
              vocat potentiam, & qua ipſa ferebantur, tandem deſinat,
                <lb/>
              atque marceſcat. </s>
              <s id="N1783B">Quod profectò duplici ex cauſa euenire
                <lb/>
              poſſe ſubiungit. </s>
              <s id="N17840">Nimirum vel propter ſimplicem retractio­
                <lb/>
              nem, vt cum proiecta alterius corporis obiectu, ſiue repulſu
                <lb/>
              retrahuntur à tali motu, ac ſiſtere coguntur: ( Nam quippe
                <lb/>
              tunc ceſſante progreſſu, ac motu, ceſſat & impetus, qui ſicut
                <lb/>
              præuio motu producitur, ita quamdiu durat conſeruatur in
                <lb/>
              motu tanquam cum propria diſpoſitione;) vel propter in­
                <lb/>
              clinationem, quam potius ipſa proiecta habeant ad alium
                <lb/>
              motum, vt ſurſum, vel deorſum per naturalem grauitatem,
                <lb/>
              aut leuitatem quando talis inclinatio rurſus coeperit præ-</s>
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          </chap>
        </body>
      </text>
    </archimedes>
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