Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 1: Opera mechanica

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              <pb o="180" file="0256" n="282" rhead="CHRISTIANI HUGENII"/>
            cto ſuſpenſionis ad ſphæræ centrum diſtantia accipiatur,
              <lb/>
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                <emph style="sc">De centro</emph>
                <lb/>
                <emph style="sc">OSCILLA-</emph>
                <lb/>
                <emph style="sc">TIONIS</emph>
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            ſphæræ autem magnitudo non definiatur proportione ad fili
              <lb/>
            longitudinem, non erit certa menſura penduli cujus recurſus
              <lb/>
            ſecunda ſcrupula metiantur; </s>
            <s xml:id="echoid-s4075" xml:space="preserve">ſed quo major erit ejus ſphæra,
              <lb/>
            hoc minor invenietur menſura illa, inter centrum ſphæræ & </s>
            <s xml:id="echoid-s4076" xml:space="preserve">
              <lb/>
            punctum ſuſpenſionis intercepta. </s>
            <s xml:id="echoid-s4077" xml:space="preserve">Quia in iſochronis pendu-
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            lis, centra quidem oſcillationis à punctis ſuſpenſionum æ-
              <lb/>
            qualiter diſtant; </s>
            <s xml:id="echoid-s4078" xml:space="preserve">amplius autem deſcendit centrum oſcilla-
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            tionis infra centrum ſphæræ majoris, quam minoris.</s>
            <s xml:id="echoid-s4079" xml:space="preserve"/>
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            <s xml:id="echoid-s4080" xml:space="preserve">Hinc neceſſe fuit illis, qui, ante hanc centri oſcillatorii
              <lb/>
            determinationem, menſuræ univerſalis conſtituendæ ratio-
              <lb/>
            nem inierunt; </s>
            <s xml:id="echoid-s4081" xml:space="preserve">quod, jam inde à prima Horologii noſtri
              <lb/>
            inventione, nobilis illa Societas Regia Anglicana ſibi nego-
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            tium ſumpſit, & </s>
            <s xml:id="echoid-s4082" xml:space="preserve">recentius doctiſſimus Aſtronomus Lugdu-
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            nenſis, Gabriel Moutonus; </s>
            <s xml:id="echoid-s4083" xml:space="preserve">his, inquam, neceſſe fuit deſi-
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            gnare globuli ſuſpenſi diametrum, vel proportione certa ad
              <lb/>
            fili longitudinem, cujus nempe triceſimam vel aliam partem
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            æquaret; </s>
            <s xml:id="echoid-s4084" xml:space="preserve">vel menſura quadam cognita, ut digiti vel polli-
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            cis. </s>
            <s xml:id="echoid-s4085" xml:space="preserve">Sed hoc poſteriore modo, ponitur jam certi aliquid,
              <lb/>
            quod id ipſum eſt quod quærendum eſt: </s>
            <s xml:id="echoid-s4086" xml:space="preserve">etſi ſcio vix ſenſi-
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            bilem errorem fore, dummodo ſphæræ iſtam, quam jam di-
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            xi, magnitudinem non multum excedant. </s>
            <s xml:id="echoid-s4087" xml:space="preserve">Priore autem
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            poſſet quidem aliquo pacto res explicari; </s>
            <s xml:id="echoid-s4088" xml:space="preserve">ſed ita, ut nu-
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            merandarum oſcillationum labor ſubeundus ſit, calculoque
              <lb/>
            etiam utendum. </s>
            <s xml:id="echoid-s4089" xml:space="preserve">Quamobrem præſtat, centra oſcillationis
              <lb/>
            adhibendo, certam rationem ſequi, nulliſque præter neceſ-
              <lb/>
            ſitatem legibus obligari. </s>
            <s xml:id="echoid-s4090" xml:space="preserve">atque hic jam majoribus ſphæris
              <lb/>
            quam exiguis potius utendum, quod illæ occurſu aëris mi-
              <lb/>
            nus impediantur.</s>
            <s xml:id="echoid-s4091" xml:space="preserve"/>
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            <s xml:id="echoid-s4092" xml:space="preserve">Cæterum, non ſphæræ tantum ex filo ſuſpenſæ, ſed & </s>
            <s xml:id="echoid-s4093" xml:space="preserve">
              <lb/>
            coni, cylindri, aliaque omnia ſolida, planaque, quorum
              <lb/>
            centra oſcillationis ſuperius exhibuimus, ad hanc menſuram
              <lb/>
            inveſtigandam, apta ſunt; </s>
            <s xml:id="echoid-s4094" xml:space="preserve">quoniam, à puncto ſuſpenſionis
              <lb/>
            ad centrum oſcillationis, certum idemque omnibus iſochronis
              <lb/>
            pendulis eſt intervallum. </s>
            <s xml:id="echoid-s4095" xml:space="preserve">Neque etiam illa duntaxat horolo-
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            gia, quæ ſecunda ſcrupula aut eorum ſemiſſes ſingulis </s>
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