Fabri, Honoré, Tractatus physicus de motu locali, 1646

Table of figures

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              inſtanti ſequenti moueritur; </s>
              <s id="N1A1A1">ſed pro alio antecedente mouebatur; igi­
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              tur quies illa durat tantùm vno inſtanti. </s>
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            <p id="N1A1A7" type="main">
              <s id="N1A1A9">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              78.
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              </s>
            </p>
            <p id="N1A1B5" type="main">
              <s id="N1A1B7">
                <emph type="italics"/>
              Quies illa non fit propter aliquam reflexionem, vt aliqui dicunt
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              ; </s>
              <s id="N1A1C0">quia nul­
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              la prorſus eſt reflexio, vbi nullum eſt reflectens; </s>
              <s id="N1A1C6">atqui nullum eſt refle­
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              ctens, vt patet, quia nullum eſt corpus impediens motus propagationem; </s>
              <s id="N1A1CC">
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              licèt enim medium impediat, non tamen per modum reflectentis pro­
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              priè; </s>
              <s id="N1A1D3">immo vt dicemus infrà in puncto reflexionis nulla datur quies; ſed
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              motus reflexus ſibi vendicat librum ſingularem. </s>
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            <p id="N1A1D9" type="main">
              <s id="N1A1DB">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
                <emph.end type="italics"/>
              79.
                <emph.end type="center"/>
              </s>
            </p>
            <p id="N1A1E7" type="main">
              <s id="N1A1E9">
                <emph type="italics"/>
              Hinc ſiue præceſſerit motus violentus, ſiue non, corpus graue eodem vel æ­
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              quali motu deorſum cadit,
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              quia nullus amplius remanet impetus violen­
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              tus in fine motus violenti, per Th.76. igitur ſolus impetus naturalis li­
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              bero motu deorsùm fertur. </s>
            </p>
            <p id="N1A1F7" type="main">
              <s id="N1A1F9">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
                <emph.end type="italics"/>
              80.
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              </s>
            </p>
            <p id="N1A205" type="main">
              <s id="N1A207">
                <emph type="italics"/>
              Hinc reiicies aliquos apud Galileum, qui volunt ideo motum naturalem
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              accelerari, quia ſenſim deſtruitur impetus violentus antè impreſſus,
                <emph.end type="italics"/>
              quod pe­
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              nitus ridiculum eſt; quia lapis deciſus è rupe etiam motu naturaliter
                <lb/>
              accelerato deorſum cadit, licèt eò nunquam motu violento euectus
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              fuerit. </s>
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            <p id="N1A218" type="main">
              <s id="N1A21A">Obſeruabis hanc hypotheſim gradus impetus violenti æqualis perfe­
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              ctionis cum innato eſſe falſam. </s>
              <s id="N1A21F">Primò, quia commodius eſt potentiæ
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              motrici producere imperfectiorem impetum, ſic enim plures illius gra­
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              dus producere poteſt. </s>
              <s id="N1A226">Secundò, quia in reflexo ſurſum vltimus gradus
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              qui deſtruitur eſt imperfectior innato, eſt enim acquiſitus; igitur in omni
                <lb/>
              alio motu ſursùm. </s>
              <s id="N1A22E">Tertiò, quia violentus eſt cum innato in eadem ſubie­
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              cti parte; ſed idem ſubiectum formas homogeneas non patitur, de quò
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              aliàs, hinc dicendum ſupereſt non quieſcere mobile in fine motus </s>
            </p>
            <p id="N1A236" type="main">
              <s id="N1A238">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
                <emph.end type="italics"/>
              81.
                <emph.end type="center"/>
              </s>
            </p>
            <p id="N1A244" type="main">
              <s id="N1A246">
                <emph type="italics"/>
              Corpus quod non grauitat proiicitur ſurſum motu æquabili per ſe
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              ; </s>
              <s id="N1A24F">patet, quia
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              nihil eſt quod deſtruat ipſum impetum; </s>
              <s id="N1A255">igitur ſemper moueretur, niſi
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              per accidens ab ipſo medio eius motus retardaretur; </s>
              <s id="N1A25B">vnde dixi
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              per ſe,
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                <lb/>
              cum ratione medij retardetur; immò quò leuius eſt, faciliùs à medio re­
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              tinetur, vide Th.61. </s>
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            <p id="N1A268" type="main">
              <s id="N1A26A">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              82.
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              </s>
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            <p id="N1A276" type="main">
              <s id="N1A278">
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              Non creſcit impetus naturalis in motu violento ſurſum
                <emph.end type="italics"/>
              ; probatur primò,
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              quia impetus naturalis aduentitius ſupponit motum deorſum, ad cuius
                <lb/>
              intenſionem à natura fuit inſtitutus per reſp. </s>
              <s id="N1A285">ad quartam obiect. </s>
              <s id="N1A288">in diſ­
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              ſert.l.2. adde quod tardiùs aſcenderet, quàm deſcenderet; </s>
              <s id="N1A28E">deinde velo­
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              ciùs deſcenderet poſtmotum violentum corpus graue, quàm ſi nullo mo­
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              tu violento præuio demitteretur deorſum, quæ omnia experimentis </s>
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