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

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            <s xml:id="echoid-s5112" xml:space="preserve">
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            in extremo uno ad formam hemiſphærii formantur, ex-
              <lb/>
            tremum alterum coni formam habet anguluſque m l n eſt
              <lb/>
            centum graduum: </s>
            <s xml:id="echoid-s5113" xml:space="preserve">angulos centum & </s>
            <s xml:id="echoid-s5114" xml:space="preserve">viginti graduum, ut
              <lb/>
            & </s>
            <s xml:id="echoid-s5115" xml:space="preserve">nonaginta graduum, in experimentis adhibui, ſed antepo-
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            nendum vidi angulum centum graduum.</s>
            <s xml:id="echoid-s5116" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5117" xml:space="preserve">Pondera cylindrorum ſunt inter ſe ut duo, tria, & </s>
            <s xml:id="echoid-s5118" xml:space="preserve">quatuor.</s>
            <s xml:id="echoid-s5119" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5120" xml:space="preserve">Cylindri etiam duo cavi formantur ex ligno; </s>
            <s xml:id="echoid-s5121" xml:space="preserve">quorum
              <lb/>
              <note position="left" xlink:label="note-0192-01" xlink:href="note-0192-01a" xml:space="preserve">
                <emph style="sc">TAB XVIII</emph>
              .
                <lb/>
              fig. 5.</note>
            diametri externæ ſeſqui pollicis ſunt, minor longitudinis eſt
              <lb/>
            trium poll.</s>
            <s xml:id="echoid-s5122" xml:space="preserve">, major quinque poll.</s>
            <s xml:id="echoid-s5123" xml:space="preserve">; repræſentatur ille in g, & </s>
            <s xml:id="echoid-s5124" xml:space="preserve">am-
              <lb/>
            borum ſectiones per axem videntur in G & </s>
            <s xml:id="echoid-s5125" xml:space="preserve">H. </s>
            <s xml:id="echoid-s5126" xml:space="preserve">Separatio in
              <lb/>
            cavitate utriuſque datur ad diſtantiam unius pollicis ab ex-
              <lb/>
            tremitate unâ; </s>
            <s xml:id="echoid-s5127" xml:space="preserve">videntur hæ in a a, a a, & </s>
            <s xml:id="echoid-s5128" xml:space="preserve">ab eſt unius
              <lb/>
            pollicis, craſſities ligni in b eſt octavæ partis pollicis. </s>
            <s xml:id="echoid-s5129" xml:space="preserve">Majo-
              <lb/>
            rem lignum habet craſſitiem in reliqua cylindri parte, ubi
              <lb/>
            nempe cavitatem majorem circumdat. </s>
            <s xml:id="echoid-s5130" xml:space="preserve">Cavitas minor, ubi
              <lb/>
            experimenta inſtituenda ſunt, argillâ repletur, & </s>
            <s xml:id="echoid-s5131" xml:space="preserve">quæ pro-
              <lb/>
            minet cultro ligneo abraditur, ut unita ſit ſuperficies in
              <lb/>
            quam cylindri, ultimum memorati, in experimentis incur-
              <lb/>
            runt; </s>
            <s xml:id="echoid-s5132" xml:space="preserve">in majorem cavitatem, minori aut majori copiâ ar-
              <lb/>
            gilla intruditur pro diverſo pondere cylindro communican-
              <lb/>
            do.</s>
            <s xml:id="echoid-s5133" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5134" xml:space="preserve">Cylindri omnes eburnei & </s>
            <s xml:id="echoid-s5135" xml:space="preserve">lignei ſequenti methodo ſu-
              <lb/>
            ſpenduntur. </s>
            <s xml:id="echoid-s5136" xml:space="preserve">Ductâ lineâ in ſuperficie cylindri cujuſcunque ut
              <lb/>
            g ad axem parallelâ, in hac duæ tenues lamellæ perforatæ, aut
              <lb/>
            exigui annuli, o, o, firmantur ut & </s>
            <s xml:id="echoid-s5137" xml:space="preserve">duplex uncus v in me-
              <lb/>
            dio. </s>
            <s xml:id="echoid-s5138" xml:space="preserve">Foramina in lamellis o, o, non majora ſunt, niſi ut
              <lb/>
            per hæc duplicatæ chordæ citharæ tranſmittantur.</s>
            <s xml:id="echoid-s5139" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5140" xml:space="preserve">Lamellæ hæ omnes ita ponuntur, ut ductis ad cylindri
              <lb/>
            axes perpendicularibus à centris foraminum; </s>
            <s xml:id="echoid-s5141" xml:space="preserve">quales in
              <lb/>
            cylindro D. </s>
            <s xml:id="echoid-s5142" xml:space="preserve">(fig. </s>
            <s xml:id="echoid-s5143" xml:space="preserve">4.) </s>
            <s xml:id="echoid-s5144" xml:space="preserve">o h, o h, perpendiculares hæ axem ſe-
              <lb/>
            cent in h, h, ad diſtantiam trium partium quartarum poll.
              <lb/>
            </s>
            <s xml:id="echoid-s5145" xml:space="preserve">ab extremitatibus p, l. </s>
            <s xml:id="echoid-s5146" xml:space="preserve">Notandum tamen reſpectu cylin-
              <lb/>
            drorum cavorum, ſatis eſſe ſi hæc tantum obſerventur re-
              <lb/>
            ſpectu lamellarum, quæ ad partem cavitatum minorum dan-
              <lb/>
            tur.</s>
            <s xml:id="echoid-s5147" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5148" xml:space="preserve">Cum globis ſingulis, ut A (Fig. </s>
            <s xml:id="echoid-s5149" xml:space="preserve">3), etiam lamella </s>
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