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

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        <div xml:id="echoid-div384" type="section" level="1" n="137">
          <pb o="189" file="0267" n="294" rhead="HOROLOG. OSCILLATOR."/>
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            <emph style="sc">De vi</emph>
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            <emph style="sc">Centri-</emph>
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            <emph style="sc">FUGA</emph>
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        <div xml:id="echoid-div385" type="section" level="1" n="138">
          <head xml:id="echoid-head167" xml:space="preserve">IV.</head>
          <p style="it">
            <s xml:id="echoid-s4244" xml:space="preserve">Si mobilia duo æqualia, in circumferentiis in-
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            æqualibus circumlata, vim centrifugam æqua-
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            lem habuerint; </s>
            <s xml:id="echoid-s4245" xml:space="preserve">erit tempus circuitus in majori cir-
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            cumferentia, ad tempus circuitus in minori, in
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            ſubdupla ratione diametrorum.</s>
            <s xml:id="echoid-s4246" xml:space="preserve"/>
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        <div xml:id="echoid-div386" type="section" level="1" n="139">
          <head xml:id="echoid-head168" xml:space="preserve">V.</head>
          <p style="it">
            <s xml:id="echoid-s4247" xml:space="preserve">Si mobile in circumferentia circuli feratur ea
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            celeritate, quam acquirit cadendo ex altitudine,
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            quæ ſit quartæ parti diametri æqualis; </s>
            <s xml:id="echoid-s4248" xml:space="preserve">habebit
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            vim centrifugam ſuæ gravitati æqualem; </s>
            <s xml:id="echoid-s4249" xml:space="preserve">hoc eſt,
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            eadem vi funem quo in centro detinetur intendet,
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            atque cum ex eo ſuſpenſum eſt.</s>
            <s xml:id="echoid-s4250" xml:space="preserve"/>
          </p>
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        <div xml:id="echoid-div387" type="section" level="1" n="140">
          <head xml:id="echoid-head169" xml:space="preserve">VI.</head>
          <p style="it">
            <s xml:id="echoid-s4251" xml:space="preserve">In cava ſuperficie conoidis parabolici, quod axem
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            ad perpendiculum erectum habeat, circuitus omnes
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            mobilis, circumferentias horizonti parallelas per-
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            currentis, ſive parvæ ſive magnæ fuerint, æqua-
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            libus temporibus peraguntur: </s>
            <s xml:id="echoid-s4252" xml:space="preserve">quæ tempora ſingula
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            æquantur binis oſcillationibus penduli, cujus longi-
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            tudo ſit dimidium lateris recti parabolæ genitricis.</s>
            <s xml:id="echoid-s4253" xml:space="preserve"/>
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