Gravesande, Willem Jacob 's, Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1

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          <p>
            <s xml:id="echoid-s13533" xml:space="preserve">
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            refractionis G np; </s>
            <s xml:id="echoid-s13534" xml:space="preserve">id eſt, radii refracti magis divergentes
              <lb/>
            fiunt, & </s>
            <s xml:id="echoid-s13535" xml:space="preserve">ad C accedit focus imaginarius f ; </s>
            <s xml:id="echoid-s13536" xml:space="preserve">donec
              <note symbol="*" position="left" xlink:label="note-0530-01" xlink:href="note-0530-01a" xml:space="preserve">646.</note>
            puncti radiantis tandem hoc coincidat cum foco imaginario
              <lb/>
            in C; </s>
            <s xml:id="echoid-s13537" xml:space="preserve">in hoc enim caſu radii nullam patiuntur refractionem .</s>
            <s xml:id="echoid-s13538" xml:space="preserve"/>
          </p>
          <note symbol="*" position="left" xml:space="preserve">629.</note>
          <p>
            <s xml:id="echoid-s13539" xml:space="preserve">Si ulterius accedat punctum radians, inter C & </s>
            <s xml:id="echoid-s13540" xml:space="preserve">O ma-
              <lb/>
              <note position="left" xlink:label="note-0530-03" xlink:href="note-0530-03a" xml:space="preserve">676.</note>
            gis diſtet focus imaginarius ab O, quàm punctum radians, in-
              <lb/>
            ter hoc enim & </s>
            <s xml:id="echoid-s13541" xml:space="preserve">C ſemper ille datur, propter angulos refra-
              <lb/>
            ctionis minores angulis incidentiæ .</s>
            <s xml:id="echoid-s13542" xml:space="preserve"/>
          </p>
          <note symbol="*" position="left" xml:space="preserve">624.</note>
        </div>
        <div xml:id="echoid-div2014" type="section" level="1" n="498">
          <head xml:id="echoid-head664" xml:space="preserve">
            <emph style="sc">Experimentum</emph>
          . 7.</head>
          <p>
            <s xml:id="echoid-s13543" xml:space="preserve">Si eadem dentur, quæ in experimento præcedenti, ad-
              <lb/>
            hibitâ tabellâ cum lente convexâ, de qua ſæpius jam di-
              <lb/>
            ctum, ad punctum radians formandum, facilia ſunt experi-
              <lb/>
            menta circa has propoſitiones.</s>
            <s xml:id="echoid-s13544" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s13545" xml:space="preserve">Si radii fuerint convergentes, & </s>
            <s xml:id="echoid-s13546" xml:space="preserve">punctum concurſus detur
              <lb/>
              <note position="left" xlink:label="note-0530-05" xlink:href="note-0530-05a" xml:space="preserve">677.</note>
            in medio denſiori, in viciniis ſuperficiei media ſeparantis, re-
              <lb/>
            fracti radii etiam convergunt, ſed minus convergunt, quàm
              <lb/>
            incidentes.</s>
            <s xml:id="echoid-s13547" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s13548" xml:space="preserve">Si ab O magis ac magis recedat focus imaginarius radio-
              <lb/>
            rum incidentium, id eſt, ſi hi minus convergant, etiam mi-
              <lb/>
              <note position="left" xlink:label="note-0530-06" xlink:href="note-0530-06a" xml:space="preserve">678.</note>
            nus convergent radii refracti; </s>
            <s xml:id="echoid-s13549" xml:space="preserve">donec, receſſu foci imagina-
              <lb/>
            rii, refracti paralleli ſint.</s>
            <s xml:id="echoid-s13550" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s13551" xml:space="preserve">In ulteriori receſſu foci imaginarii divergentes fiunt refra-
              <lb/>
              <note position="left" xlink:label="note-0530-07" xlink:href="note-0530-07a" xml:space="preserve">679.</note>
            cti radii.</s>
            <s xml:id="echoid-s13552" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div2018" type="section" level="1" n="499">
          <head xml:id="echoid-head665" xml:space="preserve">
            <emph style="sc">Experimentum</emph>
          8.</head>
          <p>
            <s xml:id="echoid-s13553" xml:space="preserve">In hoc ad pixidem ita admovenda eſt tabella T, ut ra-
              <lb/>
              <note position="left" xlink:label="note-0530-08" xlink:href="note-0530-08a" xml:space="preserve">TAB. VII.
                <lb/>
              fig 5.</note>
            dii convergentes aquam intrent; </s>
            <s xml:id="echoid-s13554" xml:space="preserve">& </s>
            <s xml:id="echoid-s13555" xml:space="preserve">in motu tabellæ prædi-
              <lb/>
            cta ad oculum patent.</s>
            <s xml:id="echoid-s13556" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s13557" xml:space="preserve">Radii, qui e medio denſiori in rarius penetrant, manente
              <lb/>
              <note position="left" xlink:label="note-0530-09" xlink:href="note-0530-09a" xml:space="preserve">680.</note>
            ſuperficie cavâ ad partem hujus medii, iiſdem fere legibus
              <lb/>
            ſubjiciuntur.</s>
            <s xml:id="echoid-s13558" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s13559" xml:space="preserve">Radii paralleli refractione divergunt .</s>
            <s xml:id="echoid-s13560" xml:space="preserve"/>
          </p>
          <note symbol="*" position="left" xml:space="preserve">678. 626.</note>
          <p style="it">
            <s xml:id="echoid-s13561" xml:space="preserve">Si à puncto radianti procedant, magis ſunt divergentes .</s>
            <s xml:id="echoid-s13562" xml:space="preserve"/>
          </p>
          <note position="left" xml:space="preserve">681.</note>
          <note symbol="*" position="left" xml:space="preserve">677.</note>
          <p style="it">
            <s xml:id="echoid-s13563" xml:space="preserve">Et cum acceſſu puncti radiantis continuo magis ac magïs
              <lb/>
              <note position="left" xlink:label="note-0530-13" xlink:href="note-0530-13a" xml:space="preserve">682.</note>
            divergunt .</s>
            <s xml:id="echoid-s13564" xml:space="preserve"/>
          </p>
          <note symbol="*" position="left" xml:space="preserve">678.</note>
          <p style="it">
            <s xml:id="echoid-s13565" xml:space="preserve">Convergentes radii, qui ad centrum ſuperficiei ſphæricæ
              <lb/>
              <note position="left" xlink:label="note-0530-15" xlink:href="note-0530-15a" xml:space="preserve">683.</note>
            tendunt, nullam ſubeunt mutationem .</s>
            <s xml:id="echoid-s13566" xml:space="preserve"/>
          </p>
          <note symbol="*" position="left" xml:space="preserve">629.</note>
          <p style="it">
            <s xml:id="echoid-s13567" xml:space="preserve">Si magis aut minus convergant, focus imaginarius inciden-
              <lb/>
              <note position="left" xlink:label="note-0530-17" xlink:href="note-0530-17a" xml:space="preserve">684.</note>
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