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

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            <s xml:id="echoid-s4427" xml:space="preserve">
              <pb o="202" file="0280" n="307" rhead="CHRIST. HUGENII INSTITUTIO"/>
            gium tardius movetur; </s>
            <s xml:id="echoid-s4428" xml:space="preserve">poſſumus etiam loco ortus & </s>
            <s xml:id="echoid-s4429" xml:space="preserve">occaſus
              <lb/>
            Solis duas æquales Solis altitudines obſervare ante & </s>
            <s xml:id="echoid-s4430" xml:space="preserve">poſt me-
              <lb/>
            ridiem, & </s>
            <s xml:id="echoid-s4431" xml:space="preserve">hora horologii annotatâ utriuſque obſervationis
              <lb/>
            tempore, eodem modo, ac hic dictum eſt procedemus.</s>
            <s xml:id="echoid-s4432" xml:space="preserve"/>
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        <div xml:id="echoid-div409" type="section" level="1" n="158">
          <head xml:id="echoid-head189" xml:space="preserve">VI.</head>
          <head xml:id="echoid-head190" style="it" xml:space="preserve">Ope Horologiorum mari invenire longitudinem loci in
            <lb/>
          quo verſaris.</head>
          <p>
            <s xml:id="echoid-s4433" xml:space="preserve">Singulis horologiis nomina vel ſigna impone ut A. </s>
            <s xml:id="echoid-s4434" xml:space="preserve">B. </s>
            <s xml:id="echoid-s4435" xml:space="preserve">C.
              <lb/>
            </s>
            <s xml:id="echoid-s4436" xml:space="preserve">& </s>
            <s xml:id="echoid-s4437" xml:space="preserve">antequam velifices, diſpone eadem ſecundum tempus ob-
              <lb/>
            fervatum per Solem in loco, ubi moraris, diminutum æquatio-
              <lb/>
            ne ejus diei, quo obſervas; </s>
            <s xml:id="echoid-s4438" xml:space="preserve">quem annotabis.</s>
            <s xml:id="echoid-s4439" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4440" xml:space="preserve">Dein ubi in mari verſaris ſi vis ſcire longitudinem loci, in
              <lb/>
            quo es; </s>
            <s xml:id="echoid-s4441" xml:space="preserve">quot gradibus Meridianus loci hujus ſit orientalior vel
              <lb/>
            occidentalior meridiano loci illius in quo adaptaſti horologia;
              <lb/>
            </s>
            <s xml:id="echoid-s4442" xml:space="preserve">obſerva Solem vel Stellas, ut determines horam, & </s>
            <s xml:id="echoid-s4443" xml:space="preserve">vide quam
              <lb/>
            horam eodem momento indicent horologia; </s>
            <s xml:id="echoid-s4444" xml:space="preserve">quam horam, ſi ho-
              <lb/>
            rologia non fuerint diſpoſita ad rectam menſuram æquabis co-
              <lb/>
            gnitâ diurnâ differentiâ, ei porrò addens æquationem præſen-
              <lb/>
            tis diei, quo ita habeas horam in loco illo, ubi horologia fue-
              <lb/>
            re diſpoſita. </s>
            <s xml:id="echoid-s4445" xml:space="preserve">Si hæc hora eadem ſit cum illa quæ obſervata
              <lb/>
            fuit in loco præſente, conſiſtis ſub eodem Meridiano, ac ubi
              <lb/>
            horologia fuere diſpoſita ad Solem: </s>
            <s xml:id="echoid-s4446" xml:space="preserve">Si vero hora obſervata
              <lb/>
            major ſit illâ quam horologia oſtendunt, certus es, te per-
              <lb/>
            veniſſe ſub Meridianum Orientaliorem; </s>
            <s xml:id="echoid-s4447" xml:space="preserve">ſin denique fuerit mi-
              <lb/>
            nor, perveniſti ſub Meridianum Occidentaliorem: </s>
            <s xml:id="echoid-s4448" xml:space="preserve">& </s>
            <s xml:id="echoid-s4449" xml:space="preserve">com-
              <lb/>
            putatis in ſingulas quasque horas differentiæ temporis 15 gra-
              <lb/>
            dibus longitudinis vel in ſingula minuta 15 minutis, vel to-
              <lb/>
            tidem quadrantibus gradus, cognoſces, quot gradibus dicti
              <lb/>
            Meridiani ab invicem diſtent. </s>
            <s xml:id="echoid-s4450" xml:space="preserve">E. </s>
            <s xml:id="echoid-s4451" xml:space="preserve">Gr. </s>
            <s xml:id="echoid-s4452" xml:space="preserve">pone Horologia A. </s>
            <s xml:id="echoid-s4453" xml:space="preserve">B. </s>
            <s xml:id="echoid-s4454" xml:space="preserve">C. </s>
            <s xml:id="echoid-s4455" xml:space="preserve">
              <lb/>
            fuiſſe aptata ad Solem in loco ex quo abiiſti, 2 Martii, id
              <lb/>
            eſt ad horam obſervatam, ſed in tantum diminutam, quanta
              <lb/>
            eſt æquatio 2 Martii, 2 min. </s>
            <s xml:id="echoid-s4456" xml:space="preserve">28 ſec. </s>
            <s xml:id="echoid-s4457" xml:space="preserve">& </s>
            <s xml:id="echoid-s4458" xml:space="preserve">pone horologium A
              <lb/>
            fuiſſe dispoſitum ad veram menſuram, ſed B moveri ſingu-
              <lb/>
            lis diebus 7 ſecundis tardius, & </s>
            <s xml:id="echoid-s4459" xml:space="preserve">C ſingulis diebus 12 ſecun-
              <lb/>
            dis citius.</s>
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