Fabri, Honoré, Tractatus physicus de motu locali, 1646
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              Theorema
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              40.
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              Ille impetus non producitur à ſubſtantia corporis in aliud impacti.
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              <s id="N13100"> Proba­
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              tur; </s>
              <s id="N13105">quia ſi produceretur, eſſet cauſa neceſſaria vt
                <expan abbr="clarũ">clarum</expan>
              eſt; igitur appli­
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              cata, & non impedita ageret per Ax. 32. quod eſt contra experientiam. </s>
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              Dicunt aliqui requiri
                <expan abbr="motũ">motum</expan>
              præuium, vt agat; ſed contra; </s>
              <s id="N13118">nam motus
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              præuius non requiritur vt cauſa, vt patet; </s>
              <s id="N1311E">quia cauſa vt agat debet exi­
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              ſtere per Ax. 9. Igitur requiritur, vt conditio, quod dici non poteſt; </s>
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              quia primo etiam conditio debet eſſe præſens; </s>
              <s id="N13129">ſed motus præuius de
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              nihil preſenti eſt ſecundo quia non poteſt excogitari aliud munus con­
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              ditionis; </s>
              <s id="N13131">niſi vel vt tollat impedimentum, vel vt applicet cauſam ſubie­
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              cto apto; </s>
              <s id="N13137">præterea motus præuius non eſt; </s>
              <s id="N1313B">igitur eodem modo ſe
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              habet, ac ſi nunquam extitiſſet; & ſi eo inſtanti quo corpus impa­
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              ctum primo tangit, amitteret totum impetum, ita vt expræterito motu
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              nihil reliquum eſſet, haud dubiè corpus aliud non pelleret. </s>
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              <s id="N13147">Diceret alius impetum eſſe tantùm conditionem, quæ ſemper eſt
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              de præſenti: </s>
              <s id="N1314D">ad hanc inſtantiam non valet ſuperior reſponſio; </s>
              <s id="N13151">& certè
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              ſi eo ipſo inſtanti contactus noua fieret impetus acceſſio; </s>
              <s id="N13157">haud dubiè
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              maior eſſet ictus; </s>
              <s id="N1315D">licèt cum eodem motu præuio, & tamen idem eſſet
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              corpus
                <expan abbr="impactũ">impactum</expan>
              , Igitur ad hanc
                <expan abbr="inſtantiã">inſtantiam</expan>
              alio modo reſpondeo, ex appli­
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              catione impetus ſemper ſequitur productio alterius impetus; </s>
              <s id="N1316D">dum ſcili­
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              cet ſubiectum, cui applicatur ſit capax motus; </s>
              <s id="N13173">ex applicatione corporis
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              ſeu ſubiecti ipſius non ſemper ſequitur; igitur dicendum eſt impetum
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              ipſum eſſe cauſam alterius per Ax. 11. n. </s>
              <s id="N1317B">1. voco enim illud cauſam,
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              ex cuius applicatione ſemper ſequitur ſimilis effectus; alioquin ſi hoc
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              neges; </s>
              <s id="N13183">proba mihi aliter ignem accendi ab alio igne; </s>
              <s id="N13187">dicam enim tibi
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              ignem applicatum eſſe tantùm conditionem, & produci à cœlo; proba
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              mihi aliter calorem produci à calore? </s>
              <s id="N1318F">quo enim medio, vel argu­
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              mento id euinces? </s>
              <s id="N13194">quo etiam non euincam impetum produci ab im­
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              petu: Deinde affer rationem à priori, propter quam ſubſtantia
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              corporis producat impetum ſurſum? </s>
              <s id="N1319C">v. g. cum non exigat à ſe ipſa mo­
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              tum ſursùm, qui violentus eſt corpori graui; numquid certum eſt, vt
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              dicemus infrà impetum produci ad extra, vt tollatur impedimentum
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              motus? </s>
              <s id="N131AA">igitur illius eſt tollere impedimentum, cuius eſt exigere motum,
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              corpus ipſum graue non exigit motum ſurſum, ſed impetus; </s>
              <s id="N131B0">igitur im­
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              petus eſt tollere impedimentum ſui effectus; </s>
              <s id="N131B6">igitur producere impetum,
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              quo vno tolli tantùm poteſt: </s>
              <s id="N131BC">En tibi rationem à priori, cutum nullam
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              habeas: Præterea, cur negas impetum eſſe cauſam ſufficientem alterius
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              impetus, cum ex eius applicatione ipſo ſenſu percipiamus produci alium
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              impetum? </s>
              <s id="N131C6">quæ ratio? </s>
              <s id="N131C9">quid inde abſurdi, quid incommodi: Igitur tàm
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              certum eſt, immò certius impetum produci ab alio impetu, quàm calo­
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              rem à calore. </s>
              <s id="N131D1">Dices impetum iam habere alium effectum ſcilicet mo­
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              tum; bella profecto ratio! ſed numquid motus eſt effectus formalis im­
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              petus? </s>
              <s id="N131D9">prætereà eſt-ne effectus ad extra? </s>
              <s id="N131DC">deinde idem dico de calore; </s>
              <s id="N131E0"/>
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