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

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          <head xml:id="echoid-head231" xml:space="preserve">MACHINÆ
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          QUÆDAM,
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          ET
            <lb/>
          VARIA
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          CIRCA
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          MECHANICAM.</head>
          <head xml:id="echoid-head232" xml:space="preserve">I.</head>
          <head xml:id="echoid-head233" style="it" xml:space="preserve">Excerpta ex Literis Domini Hugenii, novam quan-
            <lb/>
          dam Inventionem Horologiorum exactiſſino-
            <lb/>
          rum ac portatilium concernentibus.</head>
          <p>
            <s xml:id="echoid-s5445" xml:space="preserve">CUm invenerim artificium diu deſideratum quo fiant
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            Horologia & </s>
            <s xml:id="echoid-s5446" xml:space="preserve">exactiſſima ſimul & </s>
            <s xml:id="echoid-s5447" xml:space="preserve">portatilia, credo
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            rem gratam me facturum publico, ſi id communicem.
              <lb/>
            </s>
            <s xml:id="echoid-s5448" xml:space="preserve">Quamobrem mitto Tibi & </s>
            <s xml:id="echoid-s5449" xml:space="preserve">deſcriptionem & </s>
            <s xml:id="echoid-s5450" xml:space="preserve">picturam formæ,
              <lb/>
            continentem id quod in hoc invento habetur ſingulare, ut
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            inter cæteras novitates ſcientiarum, hanc quoque poſſis in-
              <lb/>
            ſerere, ſiquidem ita collubuerit, Ephemeridibus Tuis.</s>
            <s xml:id="echoid-s5451" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5452" xml:space="preserve">Horologia formâ modicâ ad hunc modum conſtructa,
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            erunt horarum indices portatiles quam exactiſſimi, ſub ma-
              <lb/>
            jori forma autem ubique utiliter adhibebuntur, ac ſpeciatim
              <lb/>
            in longitudinibus terrâ marique inveniendis, ſiquidem ipſo-
              <lb/>
            rum motus regitur à principio quodam æquabilitatis, non
              <lb/>
            aliter ac aliorum cum pendulis, per cycloidem quippe ita cor-
              <lb/>
            rectorum ut nullum vecturæ genus illa poſſit ſiſtere aut ſuf-
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            flaminare.</s>
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