Marci of Kronland, Johannes Marcus, De proportione motus figurarum recti linearum et circuli quadratura ex motu, 1648

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      <text>
        <body>
          <chap>
            <pb xlink:href="063/01/084.jpg"/>
            <p type="main">
              <s>
                <emph type="center"/>
              De cauſa inæqualis reflexionis
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s>Suppoſui hactenus in reflexione figuras rectilineas æqua­
                <lb/>
              lem dare & recipere impulſum. quod licet ut plurimum fiat;
                <lb/>
              non tamen eſt neceſſarium: ſed
                <expan abbr="quandoq;">quandoque</expan>
              percutiens mino­
                <lb/>
              rem,
                <expan abbr="quandoq;">quandoque</expan>
              nullum recipit impulſum. </s>
            </p>
            <p type="main">
              <s>Et ſiquidem totam dedit plgam,
                <expan abbr="nullamq;">nullamque</expan>
              recepit, non re­
                <lb/>
              flectit: verùm à plagâ conquieſeit. </s>
              <s>Ex parte verò plagæ mo­
                <lb/>
              tum continuat centrum gravitatis per lineam tangentem cir­
                <lb/>
              culi; cuius centrum eſt contactus, & intervallum diſtantia eiuſ­
                <lb/>
              dem centri gravitatis. </s>
              <s>At cùm minor eſt plaga à percuſſo,
                <lb/>
              mutatur ratio motùs reflexi: propterea, quòd centrum præ­
                <lb/>
              dominatur. </s>
              <s>Inæqnaliter autem reflecti corpora, ſi materiâ
                <lb/>
              differant, quantumvis eandem figuram, & magnitudinem,
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              quin et gravitatem habeant, conſtat: ſi pila plumbea, ferrea, la­
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              pidea, oſſea, lignea, coriacea ex eadem diſtantiâ terræ, aut pari­
                <lb/>
              eti allidatur. </s>
              <s>Cauſa huius inæqualitatis videtur non niſi ex
                <lb/>
              naturâ impulſûs priùs cognitâ obtineri. </s>
              <s>
                <expan abbr="Neq;">Neque</expan>
              enim cur inæ­
                <lb/>
              qualiter recipiatur, conſtare poteſt; niſi quid, & quomodo in
                <lb/>
              corporibus tecipiatur, conſtet. </s>
              <s>De quo alibi: hic verò non ni­
                <lb/>
              ſi ea, quæ ad inſtitutum facere videntur, delibabo. </s>
            </p>
            <p type="main">
              <s>Notandum ergo primò, ſi mobile percutiat aliud, produce­
                <lb/>
              re impulſum æqualem illi, quo ipſum movetur: globus enim
                <lb/>
              percuſſo æquali, eadem celeritate hunc movet: quod non niſi
                <lb/>
              ab impulſu æquali eſſe poteſt. </s>
              <s>At ſi maior aut minor gravi­
                <lb/>
              tas ineſt percuſſo, inæqualiter movetur: velociùs quidem cui
                <lb/>
              minor, tardiùs cui maior ineſt gravitas. </s>
              <s>Vnde apparet cun­
                <lb/>
              dem impulſum in paruo ſubiecto colligi & intendi; in magno
                <lb/>
              eſſe remiſſiorem: propterea, quòd alia ſit proportio moven­
                <lb/>
              tis ad mobile. </s>
              <s>Sed dubitabis an in percuſſo æquali idem ſit </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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