Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s id="s.002328">
                <pb pagenum="446" xlink:href="010/01/454.jpg"/>
                <arrow.to.target n="marg599"/>
                <lb/>
              Percuſs.) vires motiuæ tam ligni A, quàm vitri exca­
                <lb/>
              uati B æquales erunt inter ſe, quia verò à vacuo, ſeù
                <lb/>
              à nihilo prædictæ æquales virtutes motiuæ non impe­
                <lb/>
              diuntur, igitur effectus ab eis dependentes nempè
                <lb/>
              velocitates eorum æquales erunt inter ſe. </s>
            </p>
            <p type="margin">
              <s id="s.002329">
                <margin.target id="marg599"/>
              Cap. 10. de
                <lb/>
              æquitempo­
                <lb/>
              ranea natu­
                <lb/>
              rali veloci­
                <lb/>
              tate
                <expan abbr="grauiũ">grauium</expan>
              .</s>
            </p>
            <p type="main">
              <s id="s.002330">
                <emph type="center"/>
              PROP. CCX.
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.002331">
                <emph type="center"/>
                <emph type="italics"/>
              Idem corpus graue, quam cumque figuram habuerit,
                <expan abbr="deſcẽ-det">deſcen­
                  <lb/>
                det</expan>
              in ſpatio vacuo eadem prorsùs velocitate.
                <emph.end type="italics"/>
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="s.002332">SVmatur idem corpus graue, ſcilicèt maſſa ferreą
                <lb/>
              vnius libræ v. g. habeat que primò figuram py­
                <lb/>
              ramidalem, vel conicam cuius vertex in A dum mo­
                <lb/>
              uetur baſim præcedat, in B verò eius baſis antefera­
                <lb/>
              tur; poſteà cylindricæ prolixæ longitudinis, & exi­
                <lb/>
              guæ baſis vt eſt C, vel baſis dilatatæ vt eſt D effor­
                <lb/>
              metur: tandem eadem maſſa ferrea tornata
                <expan abbr="ſphærulã">ſphærulam</expan>
              ,
                <lb/>
              E efficiat, vel amplam ſphæram excauatam, aut
                <expan abbr="ar-millarẽ">ar­
                  <lb/>
                millarem</expan>
              F. </s>
              <s id="s.002333">Oſtendendum eſt idem graue A, B, C, &c.
                <lb/>
              </s>
              <s id="s.002334">in vacuo ſemper eadem velocitate deſcendere, ſcili­
                <lb/>
              cèt æqualibus temporibus æqualia ſpatia
                <expan abbr="pertrãſire">pertranſire</expan>
              .
                <lb/>
              </s>
              <s id="s.002335">Quoniam virtus premens grauitatis cauſa eſt eius
                <lb/>
              motus deorsùm, porrò motus concipi non poteſt,
                <lb/>
              quin aliqua velocitate fiat, ſcilicèt tempore deter­
                <lb/>
              minato ſpatium certum percurrat, vbi verò vna, &
                <lb/>
              eadem cauſa perſeuerat non variata, nec immutata,
                <lb/>
              neceſsè eſt vt
                <expan abbr="idẽ">idem</expan>
              effectus, deſcenſus nimirùm, nil
                <lb/>
              prorsùs variatus alteratuſque ſubſequatur, vt
                <expan abbr="nimirũ">nimirum</expan>
                <lb/>
                <expan abbr="">cum</expan>
              certa, & determinata velocitate fiat, igitur idem </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>