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

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          <p>
            <s xml:id="echoid-s4189" xml:space="preserve">
              <pb o="186" file="0262" n="288" rhead="CHRISTIANI HUGENII"/>
            to plura dicenda habeo, quam quæ hoc tempore exequi va-
              <lb/>
              <note position="left" xlink:label="note-0262-01" xlink:href="note-0262-01a" xml:space="preserve">
                <emph style="sc">Secundi</emph>
                <lb/>
                <emph style="sc">@OROLO-</emph>
                <lb/>
                <emph style="sc">GII DE-</emph>
                <lb/>
                <emph style="sc">SORIPTIO</emph>
              .</note>
            cet. </s>
            <s xml:id="echoid-s4190" xml:space="preserve">Sed, ut nova nec inutili ſpeculatione maturius fruantur
              <lb/>
            harum rerum ſtudioſi, neve caſu aliquo intercidat, hanc
              <lb/>
            quoque partem, præter deſtinatum, cæteris adjunxi, qua
              <lb/>
            machinæ hujus fabrica breviter exponitur, ſimulque Theo-
              <lb/>
            remata traduntur, ad Vim Centrifugam pertinentia; </s>
            <s xml:id="echoid-s4191" xml:space="preserve">demon-
              <lb/>
              <note symbol="*" position="left" xlink:label="note-0262-02" xlink:href="note-0262-02a" xml:space="preserve">Vide Au-
                <lb/>
              ctoris Opera
                <lb/>
              poſthuma
                <lb/>
              p. 401.
                <lb/>
              & ſeq.</note>
            ſtratione ipſorum in aliud tempus dilata .</s>
            <s xml:id="echoid-s4192" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div379" type="section" level="1" n="134">
          <head xml:id="echoid-head161" style="it" xml:space="preserve">Horologii ſecundi conſtructio.</head>
          <p>
            <s xml:id="echoid-s4193" xml:space="preserve">Non neceſſarium duxi, ut rotarum, quibus interiora ho-
              <lb/>
              <note position="left" xlink:label="note-0262-03" xlink:href="note-0262-03a" xml:space="preserve">TAB.XXVII.
                <lb/>
              Fig. 5.</note>
            rologii conſtant, diſpoſitionem hic exhiberem; </s>
            <s xml:id="echoid-s4194" xml:space="preserve">cum ea ab
              <lb/>
            artificibus facile ordinari, variiſque modis mutari poſſit;
              <lb/>
            </s>
            <s xml:id="echoid-s4195" xml:space="preserve">ſed eam partem explicari ſatis eſſe, quæ motum ejus certa
              <lb/>
            ratione moderatur. </s>
            <s xml:id="echoid-s4196" xml:space="preserve">Cujus partis hic figura expreſſa eſt.</s>
            <s xml:id="echoid-s4197" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4198" xml:space="preserve">Axis D H ad horizontem erectus intelligendus eſt, ac
              <lb/>
            ſuper polis duobus mobilis. </s>
            <s xml:id="echoid-s4199" xml:space="preserve">Huic ad A affixa eſt lamina,
              <lb/>
            latitudine aliqua prædita, curvataque ſecundum lineam
              <lb/>
            A B; </s>
            <s xml:id="echoid-s4200" xml:space="preserve">quæ eſt paraboloides illa de qua oſtendimus, Propoſ. </s>
            <s xml:id="echoid-s4201" xml:space="preserve">8.
              <lb/>
            </s>
            <s xml:id="echoid-s4202" xml:space="preserve">partis 3, evolutione ejus, poſtquam ipſi recta quædam juncta
              <lb/>
            fuerit, deſcribi parabolam. </s>
            <s xml:id="echoid-s4203" xml:space="preserve">Earecta hic eſt A E; </s>
            <s xml:id="echoid-s4204" xml:space="preserve">parabolam
              <lb/>
            vero, ex evolutione totius B A E deſcriptam, refert linea
              <lb/>
            E F. </s>
            <s xml:id="echoid-s4205" xml:space="preserve">Filum curvæ B A applicatum, cujus extremo puncto
              <lb/>
            parabola deſcribitur, eſt B G F. </s>
            <s xml:id="echoid-s4206" xml:space="preserve">Pondus illi affixum F. </s>
            <s xml:id="echoid-s4207" xml:space="preserve">
              <lb/>
            Dum autem axis D H in ſeſe vertitur, filum B G F, in re-
              <lb/>
            ctam lineam extenſum, ſphærulam F una circumducit,
              <lb/>
            ita ut circulos horizonti parallelos percurrat; </s>
            <s xml:id="echoid-s4208" xml:space="preserve">qui majores
              <lb/>
            minoreſve erunt, prout majori aut minori vi axis D H,
              <lb/>
            ab rotis horologii in tympanidium K agentibus, incitabitur: </s>
            <s xml:id="echoid-s4209" xml:space="preserve">
              <lb/>
            ſed ita, ut omnes in ſuperficie conoidis parabolici continean-
              <lb/>
            tur. </s>
            <s xml:id="echoid-s4210" xml:space="preserve">Atque hoc ipſo æqualia ſemper circuitus tempora eva-
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            dent, ut ex iis, quæ de hoc motu poſtea dicemus, appa-
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            rebit.</s>
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          </p>
          <p>
            <s xml:id="echoid-s4212" xml:space="preserve">Quod ſi circuitus ſingulos, ſecundorum ſcrupulorum ſe-
              <lb/>
            miſſes notare velimus, oportet latus rectum parabolæ E F
              <lb/>
            eſſe 4{1/2} unciarum pedis Horarii noſtri, hoc eſt </s>
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