Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

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              abſtrahunt grauitas, & leuitas, quæ proinde ſpecie differunt
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              inter ſe, & ab ipſo impetu. </s>
              <s id="N17DB4">Præterquam quod impetus dif­
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              fert à grauitate, & leuitate ratione principij extrinſeci, à
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              quo per
                <expan abbr="accidẽs">accidens</expan>
              procedit abſque exigentia naturæ, nec non
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              ratione deſitionis abſque introductione qualitatis contra­
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              riæ. </s>
              <s id="N17DC3">Quare diximus non eſſe virtutem innatam, ac perma­
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              nentem in ſubiecto, ſicut eſt grauitas, & leuitas, quæ vnicui­
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              que corpori debentur à propria natura. </s>
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            <p id="N17DCA" type="main">
              <s id="N17DCC">Denique dicimus, hanc virtutem motiuam impetus à
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              proijciente in ipſo actu proiectionis produci, non quidem
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              formaliter per motum localem, qui ſolùm eſt productiuus
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              præſentiæ localis ſed concomitanter ad illum per actionem
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              diſtinctam, quæ prout tendit ad qualitatem dici poteſt alte­
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              ratio latè ſumpta; tum vel maximè qualitatis productio non
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              fit in inſtanti, ſed in tempore attamen breuiſſimo. </s>
              <s id="N17DDB">Etenim
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              licet impetus propriè non habeat contrarium, nihilominus
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              cum eius productio neceſſariò ſequatur motum
                <expan abbr="localẽ">localem</expan>
              , tan­
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              quam conditionem requiſitam ad exerendas, & applican­
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              das vires proijcientis, neceſſariò etiam ipſa proportiando ſe
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              illi, fit ſucceſsiuè, atque in tempore. </s>
              <s id="N17DEC">Quare impetus pau­
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              latim intenditur ab eodem proijciente magis, ac magis ſe
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              applicante in parua illa morula,
                <expan abbr="paulatimq.">paulatimque</expan>
              nec ſtatim per
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              omnes proiecti partes ſecundum eandem intentionem, vt
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              in lumine, quod pariter non in qualibet diſtantia diffunditur
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              ſecundum eandem intentionem, ſed ſucceſsiuè, quamuis ab­
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              ſolutè in inſtanti producatur. </s>
              <s id="N17DFF">Poſt emiſsionem verò pro­
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              iecti, nullam fieri intenſionem, nec diffuſionem explicatæ
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              qualitatis in eodem ſubiecto conſentaneum eſt; ſed tantum
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              in aerem quem offendit, quemque commotum facilius va­
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              let vlterius pellere. </s>
              <s id="N17E0A">Vnde prouenit, vt velocior ſit motus
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              proiecti in poſterioribus partibus, quàm in prioribus, quouſ­
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              que talis virtus hebetata langueſcat, vt præcedenti quæſt.
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              </s>
              <s id="N17E12">explicatum eſt. </s>
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              <s id="N17E17">Ex quo pariter intelligitur, cur proiecta in vacuo non
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              mouerentur proprio motu, vt docet Ariſtoteles 4. Phyſic.
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              tex. 68. Nam præcipua ratio ſucceſsionis in motu locali </s>
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