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

Table of contents

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[141.] VII.
[142.] VIII.
[143.] IX.
[145.] XI.
[146.] XII.
[147.] XIII.
[148.] FINIS.
[149.] BREVIS INSTITUTIO DE USU HOROLOGIORUM AD INVENIENDAS LONGITUDINES.
[150.] Adr. Metius in Geographicis Inſtitutionibus Cap. 4.
[151.] Fournier in Hydrographia 1. 12. C. 35.
[152.] Didericus Rembrantz a Nierop in Animadverſionibus de inveniendis longitudinibus.
[153.] BREVIS INSTRUCTIO DE USU HOROLO-GIORUM AD INVENIENDAS LONGITUDINES. I.
[154.] II.
[155.] III.
[156.] IV.
[157.] V. Reducere horologia ad rectam dierum menſuram vel cogno-ſcere quanto citius vel tardius ſpatio 24 horarum movean-tur.
[158.] VI. Ope Horologiorum mari invenire longitudinem loci in quo verſaris.
[159.] VII. Mari invenire horam diei.
[160.] VIII. Quomodo ex obſervatione ortus & occaſus Solis & ex hora horologiorum longitudo mari inveniri queat.
[161.] IX.
[163.] XI.
[164.] XII.
[165.] FINIS.
[166.] EXCERPTA EX LITERIS DATIS LONDINI {13/23} JANUARII MDCLXV.
[167.] EXCERPTA EX LITERIS HAGÆ CO-MITUM, DIE XXVI. FEBRUAR MDCLXV. DATIS.
[168.] DE HUGENIANA CENTRI OSCILLATIONIS DETERMINATIONE CONTROVERSIA.
[169.] DE HUGENIANA CENTRI OSCILLATIONIS DETERMINATIONE CONTROVERSIA. I. Obſervationes Abbatis Catelani in propoſitio-nem, quæ fundamentum eſt 4æ. partis tra-ctatus de Pendulis, Hugenii.
[170.] II. Domini Abbatis Catelani Examen Ma-thematicum Centri Oſcillationis.
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            <s xml:id="echoid-s4501" xml:space="preserve">
              <pb o="204" file="0282" n="309" rhead="CHRIST. HUGENII INSTITUTIO"/>
            tum eſt: </s>
            <s xml:id="echoid-s4502" xml:space="preserve">locum, qui 180. </s>
            <s xml:id="echoid-s4503" xml:space="preserve">gradus Orientem verſus ab alio
              <lb/>
            diſtat, tantum etiam Occidentem verſus inde diſtare: </s>
            <s xml:id="echoid-s4504" xml:space="preserve">& </s>
            <s xml:id="echoid-s4505" xml:space="preserve">pa-
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            riter, qui 300. </s>
            <s xml:id="echoid-s4506" xml:space="preserve">gradus Orientaliter ab alio diſtat etiam 60.
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            </s>
            <s xml:id="echoid-s4507" xml:space="preserve">gradus Occidentaliter inde diſtare.</s>
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        <div xml:id="echoid-div411" type="section" level="1" n="159">
          <head xml:id="echoid-head191" xml:space="preserve">VII.</head>
          <head xml:id="echoid-head192" style="it" xml:space="preserve">Mari invenire horam diei.</head>
          <p>
            <s xml:id="echoid-s4509" xml:space="preserve">Quandoquidem pro invenienda longitudine requiritur ut
              <lb/>
            hora loci, in quo es, cognita ſit, ut ſupra dictum eſt, di-
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            cta hora ſumma exactitudine eſt obſervanda; </s>
            <s xml:id="echoid-s4510" xml:space="preserve">unumquodque
              <lb/>
            enim minutum quo in calculo aberras conſtituit errorem {1/4}.
              <lb/>
            </s>
            <s xml:id="echoid-s4511" xml:space="preserve">gradus in longitudine, id eſt, prope Æquatorem 3{1/4}. </s>
            <s xml:id="echoid-s4512" xml:space="preserve">Germa-
              <lb/>
            nicorum milliarium ſed minus ubi longe inde abes:</s>
            <s xml:id="echoid-s4513" xml:space="preserve"/>
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          <p>
            <s xml:id="echoid-s4514" xml:space="preserve">Quare ad certam horæ inventionem, ne fidas obſervationi
              <lb/>
            maximæ Solis altitudinis, ut inde concludas præciſe meridiem
              <lb/>
            eſſe vel Solem in Meridiano, niſi inter Tropicos Sol fuerit in
              <lb/>
            ipſo puncto Zenith vel ei quam proximus. </s>
            <s xml:id="echoid-s4515" xml:space="preserve">Nam alias Sol
              <lb/>
            exiſtens prope Meridianum aliquamdiu perſeverat ſine ulla
              <lb/>
            ſenſibili mutatione altitudinis ſuæ; </s>
            <s xml:id="echoid-s4516" xml:space="preserve">ideoque altitudo meri-
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            dialis idonea ſatis eſt ad latitudinem vel elevationem Poli
              <lb/>
            loci alicujus dimetiendam, non tamen ad longitudinem ejus
              <lb/>
            exacte inveniendam. </s>
            <s xml:id="echoid-s4517" xml:space="preserve">Multo minus niti potes pyxidibus nau-
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            ticis in accurato meridiei tempore inquirendo.</s>
            <s xml:id="echoid-s4518" xml:space="preserve"/>
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            <s xml:id="echoid-s4519" xml:space="preserve">Neque annuli Aſtronomici vel alia horologia ſolaria certa
              <lb/>
            ſatis ſunt in oſtendenda hora ad minuta & </s>
            <s xml:id="echoid-s4520" xml:space="preserve">ſecunda. </s>
            <s xml:id="echoid-s4521" xml:space="preserve">Sed me-
              <lb/>
            lius eſt obſervare ſolis altitudinem, ubi eſt in Oriente vel
              <lb/>
            Occidente, quo autem Orienti aut Occidenti propior eſt,
              <lb/>
            eo melius; </s>
            <s xml:id="echoid-s4522" xml:space="preserve">ibi enim cum eſt, mutatur ejus altitudo ſen-
              <lb/>
            ſibiliter magis quam ante vel poſt & </s>
            <s xml:id="echoid-s4523" xml:space="preserve">ita, ex inventa Poli ele-
              <lb/>
            vatione, & </s>
            <s xml:id="echoid-s4524" xml:space="preserve">nota Solis declinatione, hora poteſt computatione
              <lb/>
            detegi, cujus modus ab aliis ſatis deſcriptus eſt; </s>
            <s xml:id="echoid-s4525" xml:space="preserve">quia tamen
              <lb/>
            computatio illa moleſta eſt & </s>
            <s xml:id="echoid-s4526" xml:space="preserve">nonnulli errores in menſuranda
              <lb/>
            altitudine Solis committi poſſunt faciliorem hic methodum
              <lb/>
            oſtendam & </s>
            <s xml:id="echoid-s4527" xml:space="preserve">demonſtrabo.</s>
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