Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              <s id="N160F4">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              6.
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              </s>
            </p>
            <p id="N16101" type="main">
              <s id="N16103">
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              Ille impetus ab aliqua cauſa producitur.
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              </s>
              <s id="N1610A"> Probatur, quia quidquid de no­
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              uo eſt, habet cauſam per Ax.8. lib. 1. </s>
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            <p id="N16110" type="main">
              <s id="N16112">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              7.
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              </s>
            </p>
            <p id="N1611E" type="main">
              <s id="N16120">Producitur ab aliqua cauſa intrinſeca, quia non producitur ab aliqua
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              extrinſeca; alioquin motus naturalis eſſet ab extrinſeco contra definitio­
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              nem primam, & Th.1. </s>
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            <p id="N16129" type="main">
              <s id="N1612B">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              8.
                <emph.end type="center"/>
              </s>
            </p>
            <p id="N16137" type="main">
              <s id="N16139">
                <emph type="italics"/>
              Hinc produci tantùm poteſt ab ipſa ſubstantia corporis grauis; </s>
              <s id="N1613F">nam graui­
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              tas eſt ipſe impetus innatus, de qua infrà:
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              probatur; </s>
              <s id="N16148">quia nihil eſt aliud in­
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              trinſecum, à quo produci poſſit; quòd autem non producatur ab alio im­
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              petu ad intra, patet per Th.41. lib. 1. </s>
            </p>
            <p id="N16151" type="main">
              <s id="N16153">
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                <emph type="italics"/>
              Theorema
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              9.
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              </s>
            </p>
            <p id="N1615F" type="main">
              <s id="N16161">
                <emph type="italics"/>
              Impetus productus primo instanti durat proximè ſequenti.
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              </s>
              <s id="N16168"> Probatur pri­
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              mò; </s>
              <s id="N1616D">quia ſemper habet ſuum effectum formalem; vel grauitationis, ſi
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              impeditur; </s>
              <s id="N16173">vel motus in medio libero; </s>
              <s id="N16177">igitur non eſt fruſtrà; </s>
              <s id="N1617B">igitur
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              non deſtruitur per Th.162.lib.1. nihil enim exigit deſtructionem; </s>
              <s id="N16181">non
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              tota natura, quia non eſt fruſtrà per Ax. 6. non à contrario impetu, qui
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              ſæpè abeſt, vt cum liberè mouetur corpus graue in aëre, vel ſuſtinetur,
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              v.g. glans plumbea ab ingenti rupe: </s>
              <s id="N1618D">adde quod, licèt producatur in cor­
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              pore graui impetus violentus ſurſum, non deſtruitur, tamen innatus; alio­
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              quin nihil eſſet, quod deſtrueret violentum per Th.150. & Schol. Th.
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              152.num.6.lib.1. </s>
            </p>
            <p id="N1619B" type="main">
              <s id="N1619D">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              10.
                <emph.end type="center"/>
              </s>
            </p>
            <p id="N161A9" type="main">
              <s id="N161AB">
                <emph type="italics"/>
              Impetus ille innatus, qui durat ſecundo instanti, conſeruatur ab aliqua cau­
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              ſa
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              ; eſt certum per Ax. 14.lib.1.num.1. </s>
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            <p id="N161B7" type="main">
              <s id="N161B9">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              11.
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              </s>
            </p>
            <p id="N161C5" type="main">
              <s id="N161C7">
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              Non conſeruatur à cauſa primò productiua.
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              </s>
              <s id="N161CE"> Probatur per Th.144. lib.1.
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              alioquin non poſſet intendi ab eadem cauſa per Th. 146. lib 1. quippè
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              conſeruatio nihil eſt aliud, quàm repetita productio, vt conſtat; </s>
              <s id="N161D6">nam
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              cauſa conſeruans verè influit; </s>
              <s id="N161DC">igitur ſi eſt cauſa neceſſaria primo, & ſe­
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              cundo inſtanti æquali niſu influit; </s>
              <s id="N161E2">influit enim quantum poteſt per Ax.
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              12.lib.1.quòd autem impetus intendatur, demonſtrabimus infrà; </s>
              <s id="N161E9">conſule
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              Schol.Th.146.lib.1.in quo habes rationem præclari natura inſtituti; </s>
              <s id="N161EF">quo
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              ſcilicet factum eſt, vt qualitates, quæ contrario carent à causâ primò pro­
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              ductiua; aliæ verò, quæ contrarium habent, ab alia causà conſer­
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              uentur. </s>
            </p>
            <p id="N161F9" type="main">
              <s id="N161FB">
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              Corollarium.
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                <emph.end type="center"/>
              </s>
            </p>
            <p id="N16207" type="main">
              <s id="N16209">Hinc ab aliâ causâ conſeruari neceſſe eſt, vt patet, eáque aplicatâ per
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              Ax.10.lib.1. quæcumque tandem illa ſit; nos aliquando cauſam primam
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              eſſe dicemus. </s>
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