Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              <s id="N12087">Dices cum graue aliquod mouetur deorſum, vel leue ſurſum, vel
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              corpus animatum ſe ipſum mouet, dici poteſt ſubſtantia corporis cauſa
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              immediata motus. </s>
              <s id="N1208E">Reſp. negando, tùm quia omnis potentia motrix
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              agit; </s>
              <s id="N12094">igitur producit aliquid aliud, quod eſt cauſa motus: præterea po­
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              tentia motrix corporis animati, agit vſque ad defatigationem, ſudorem,
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              licèt non ſit motus, igitur aliud producit, de corpore graui probabi­
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              mus infrà. </s>
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            <p id="N1209E" type="main">
              <s id="N120A0">
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              Theorema
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              6.
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              </s>
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            <p id="N120AD" type="main">
              <s id="N120AF">
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              Datur impetus.
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              </s>
              <s id="N120B6"> Demonſtro, Subſtantia mobilis non eſt cauſa imme­
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              diata motus, per Th.5. ergo aliquid aliud; igitur impetus, nam quod di­
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              ſtinctum eſt à ſubſtantia mobilis, & exigit motum, eſt impetus per
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              Def.3. ſed quia hoc Theorema eſt veluti princeps huius tractatus cardo,
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              in eo paulò diutius hærendum eſt, igitur. </s>
            </p>
            <p id="N120C2" type="main">
              <s id="N120C4">Demonſtro primò dari impetum: </s>
              <s id="N120C8">Quidquid eſt, & antè non erat, non
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              eſt à ſe, ſed habet cauſam per Ax.8. Motus de nouo eſt per hypotheſim
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              tertiam; </s>
              <s id="N120D0">igitur habet cauſam, ſed non aliam, quam impetum, quod pro­
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              bo: </s>
              <s id="N120D6">Lapis cadens, vel impactus in alium lapidem mouet illum per hy­
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              poth.7. ſed ſubſtantia lapidis in alium impacti non eſt cauſa huius mo­
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              tus, quia eſſet cauſa neceſſaria vt patet; </s>
              <s id="N120DE">igitur applicata eundem effe­
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              ctum produceret per Ax.12. ſed etiam applicata immediata non agit, vt
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              conſtat experientia; igitur per idem Axioma non eſt cauſa. </s>
            </p>
            <p id="N120E6" type="main">
              <s id="N120E8">Scio eſſe aliquas reſponſiones, quas infrà refellemus; nunc ſufficiat
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              dixiſſe lapidem impactum non producere motum, qui propriè non pro­
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              ducitur per Th.2. nec exigere, vt conſtat ex ſecunda probatione Th. 5.
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              igitur ſi aliquid exigit, vel producit, voco impetum. </s>
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              <s id="N120F4">Secundò probatur; potentia motrix eſt actiua, quia defatigatur, quis
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              hoc neget? </s>
              <s id="N120F9">igitur aliquid producit; </s>
              <s id="N120FD">non motum, qui propriè non pro­
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              ducitur per Th.2. igitur aliquid aliud; voco impetum; </s>
              <s id="N12103">adde quod etiam
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              ſine motu agit, & defatigatur vt iam dictum eſt; </s>
              <s id="N12109">igitur habet alium effe­
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              ctum immediatum; denique mouere, pellere, trahere, proiicere, percu­
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              tere, nihil niſi actionem ſonant. </s>
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            <p id="N12111" type="main">
              <s id="N12113">Tertiò probatur; pila diſiuncta à manu proiicientis diu adhuc mo­
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              uetur per hypoth.6. igitur hic motus habet cauſam per Ax. 8. quælibet
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              enim pars motus de nouo eſt, neque duæ illius partes ſimul eſſe poſſunt. </s>
              <s id="N1211A">
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              atqui potentia motrix non eſt cauſa per Ax.10. immò poteſt eſſe deſtru­
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              cta; igitur non eſt cauſa per Ax. 9. Non eſt etiam cauſa ſubſtantia pilæ
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              mobilis per Th.5.5. nec priores pattes motus per reſp. </s>
              <s id="N12125">ad primam in­
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              ſtantiam Th 5. igitur aliquid aliud; voco impetum. </s>
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              <s id="N1212D">Quartò probatur; </s>
              <s id="N12130">pila proiecta ſenſim ſine ſenſu tardiore motu
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              mouetur; donec tandem moueri omnino deſinat per hypoth. </s>
              <s id="N12136">5. igitur
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              non eſt ſemper æqualis, & eadem cauſa huius motus per Ax. 12. & 13.
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              num.3. igitur cauſa huius motus eodem modo debilitatur, ſeu remitti­
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              tur, quo ipſe motus; </s>
              <s id="N12140">ſed decreſcit ſubſtantia mobilis, nec potentia mo-</s>
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