Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              <s id="N21458">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              1.
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              </s>
            </p>
            <p id="N21465" type="main">
              <s id="N21467">
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              Datur motus circularis.
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              </s>
              <s id="N2146E"> Probatur infinitis ferè experimentis; primò in
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              librâ cuius brachia motu tantùm circulari deſcendunt. </s>
              <s id="N21474">Secundò in ve­
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              cte, qui etiam mouetur circulari motu; </s>
              <s id="N2147A">Tertiò in turbine, rota molari,
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              liquore contento intra vas ſphæricum; Quartò in funependulo vibrato. </s>
              <s id="N21480">
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              Probatur ſecundò; </s>
              <s id="N21485">quia poteſt imprimi impetus vtrique extremitati ci­
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              lindri in partes oppoſitas, ſit enim cilindrus, vel parallelipedum LC,
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              cuius extremitati imprimatur impetus, per lineam CP, itemque extre­
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              mitati L æqualis per lineam LG oppoſitam CP. Dico, quod mouebitur
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              circulariter circa centrum K, ita vt extremitas L conficiat arcum LB &
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              C arcum CE; </s>
              <s id="N21493">nec enim C moueri poteſt per CP neque L per LM; </s>
              <s id="N21497">
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              quippe cùm ſit æqualis impetus, neutra extremitas præualere poteſt: </s>
              <s id="N2149C">non
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              vtraque, quia MP eſt maior LC; </s>
              <s id="N214A2">nec dici poteſt neutram moueri, cum
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              moueri poſſit L per arcum LT, & C per arcum CS; </s>
              <s id="N214A8">quippe impetus
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              eſt indifferens ad omnem lineam; & hæc eſt ratio à priori circularis
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              motus de qua fusè infrà. </s>
            </p>
            <p id="N214B0" type="main">
              <s id="N214B2">Obſeruabis motum circularem ab iis negari, qui ex punctis mathema­
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              ticis continuum componunt; </s>
              <s id="N214B8">quia ex eo ſequeretur non poſſe dari mo­
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              tum continuum velociorem, vel tardiorem, quod ridiculum eſt; </s>
              <s id="N214BE">ſi enim
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              punctum Q æquali tempore moueatur cum puncto C certè arcus QR
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              quem percurrit eo tempore, quo C percurrit arcum CS, eſſet æqualis
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              arcui CS, quod eſt abſurdum; </s>
              <s id="N214C8">quod certè ne admittere cogantur, mo­
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              tum circularem negant, quod æquè abſurdum eſt; </s>
              <s id="N214CE">præſertim eum ad vi­
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              tandum motum circularem infinita quoque abſurda deglutiant, ma­
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              nifeſtis experimentis contradicant, oculos ipſos intuentium præſtigiis
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              illudi aſſerant, ferreum vectem dum mouetur in mille partes diffringi
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              etiam iurent; ſed hæc omitto. </s>
            </p>
            <p id="N214DA" type="main">
              <s id="N214DC">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              2.
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              </s>
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              Niſi impediretur impetus determinatio per lineam rectam, non daretur mo­
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              tus circularis ſaltem in ſublunaribus.
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              v. g. niſi impediretur determinatio
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              impetus, qui ineſt puncto L per lineam LM; </s>
              <s id="N214FC">haud dubiè non mouere­
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              tur per arcum LB, ſed per rectam LM; igitur ille motus non eſſet cir­
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              cularis. </s>
            </p>
            <p id="N21504" type="main">
              <s id="N21506">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              3.
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              </s>
            </p>
            <p id="N21513" type="main">
              <s id="N21515">
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              Hinc motus circularis oritur ex recto impedito in ſingulis punctis
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              : </s>
              <s id="N2151E">dixi in
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              ſingulis punctis; </s>
              <s id="N21524">quia licèt in puncto L impediretur, non tamen in ſe­
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              quenti; </s>
              <s id="N2152A">eſſet quidem noua linea determinationis, non tamen curua; ſi
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              tamen in ſingulis punctis impediatur æquali ſemper radio, haud dubiè
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              eſt circularis. </s>
            </p>
            <p id="N21532" type="main">
              <s id="N21534">Obſeruabis dictum eſſe ſupra in ſublunaribus quia corpora cœleſtia
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              mouentur motu circulari non habita vlla ratione motus recti, de quo
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              ſuo loco. </s>
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