Musschenbroek, Petrus van, Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae

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            <s xml:id="echoid-s4145" xml:space="preserve">
              <pb o="167" file="0181" n="181" rhead="DEMAGNETE."/>
            371. </s>
            <s xml:id="echoid-s4146" xml:space="preserve">proſtat ejuſmodi obſervatio, adeoque confirmatur præcedens
              <lb/>
            nota, nempe hanc partem Lineæ motam fuiſſe verſus Ortum, hoc eſt
              <lb/>
            verſus Promontorium Bonæ Spei: </s>
            <s xml:id="echoid-s4147" xml:space="preserve">Sed operæ pretium erit mo-
              <lb/>
            tum hujus Lineæ, quam Meridianum Magneticum haud incongrue
              <lb/>
            vocaremus, ex vetuſtioribus eruere obſervatis: </s>
            <s xml:id="echoid-s4148" xml:space="preserve">Anno 1638 Vien-
              <lb/>
            næ in Auſtria non declinavit Magnes, nec Londini Anno 1657,
              <lb/>
            nec Pariſiis anno 1666. </s>
            <s xml:id="echoid-s4149" xml:space="preserve">nec anno 1600 in Promontorio Africæ das
              <lb/>
            Aguilhas: </s>
            <s xml:id="echoid-s4150" xml:space="preserve">ante hæc tempora in memoratis locis, & </s>
            <s xml:id="echoid-s4151" xml:space="preserve">in omnibus Eu-
              <lb/>
            ropæ Africæque regionibus magis ad Occidentem fitis, Declinatio
              <lb/>
            Magnetis Orientem verſus obſervabatur: </s>
            <s xml:id="echoid-s4152" xml:space="preserve">è contrario in locis magis
              <lb/>
            ad Orientem vergentibus regnabat Magnetis Declinatio Occidenta-
              <lb/>
            lis: </s>
            <s xml:id="echoid-s4153" xml:space="preserve">Meridianus hic Magneticus ita comparatus eſt, ut ad ſuum la-
              <lb/>
            tus occidentale Declinationem Orientalem habeat, ad latus orti-
              <lb/>
            vum occidentalem: </s>
            <s xml:id="echoid-s4154" xml:space="preserve">Quamobrem hic idem fuit, qui annis ſupe-
              <lb/>
            rioribus tranſiit ſupra Viennam, Londinum, Lutetias, promonto-
              <lb/>
            riumque das Aguilhas, atque progreſſus fuit verſus Occaſum, ſimul
              <lb/>
            â parte Boreâ Terræ deſcendendo quaſi verſus Auſtrum, velociori-
              <lb/>
            que motu percurrendo Europæ regiones & </s>
            <s xml:id="echoid-s4155" xml:space="preserve">Atlanticum Oceanum,
              <lb/>
            quam quidem Africæ ultimas terras, & </s>
            <s xml:id="echoid-s4156" xml:space="preserve">Æthyopici maris partem,
              <lb/>
            & </s>
            <s xml:id="echoid-s4157" xml:space="preserve">quia Halleyus pro anno 1700, atque Feuillejus octo annis poſt,
              <lb/>
            ad latitudinem Bor. </s>
            <s xml:id="echoid-s4158" xml:space="preserve">5°, 24?</s>
            <s xml:id="echoid-s4159" xml:space="preserve">, & </s>
            <s xml:id="echoid-s4160" xml:space="preserve">ad longitudinem 357°, 3? </s>
            <s xml:id="echoid-s4161" xml:space="preserve">Meridia-
              <lb/>
            num hunc permanſiſie in eodem loco notant, cujus tamen pars Bo-
              <lb/>
            rea perpetuo magis Occaſum verſus declinare pergit, cum pars Au-
              <lb/>
            ſtralis Ortum verſus incedat, uti modo adnotavimus, liquet locum
              <lb/>
            a Feuillejo inventum eſſe inſtar alicujus centriſuper quo Meridianus
              <lb/>
            Magneticus librationis ſpeciem patitur, ita ut cum unâ parte Oc-
              <lb/>
            caſum verſus moveatur, altera Orientem verſus incedat; </s>
            <s xml:id="echoid-s4162" xml:space="preserve">plureshu-
              <lb/>
            jus Meridiani motus poſtera deteget ætas, modo ab omnibus nau-
              <lb/>
            tis Oceanos Atlanticos & </s>
            <s xml:id="echoid-s4163" xml:space="preserve">Æthyopicos ac Indicos tranſcurrentibus
              <lb/>
            accuratæ capiantur quotidie Declinationum Magneticarum obſer-
              <lb/>
            vationes.</s>
            <s xml:id="echoid-s4164" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4165" xml:space="preserve">Sinunciterum introſpiciamus Mappam Halleyi, dantur aliæ curvæ
              <lb/>
            inter Lineam expertem Declinationis & </s>
            <s xml:id="echoid-s4166" xml:space="preserve">Americam, quæ ductæ ſunt
              <lb/>
            ſupraloca eam paſſa Declinationis quantitatem, quæ deſignantur nu-
              <lb/>
            meris 5, 10, 15, 20, 25: </s>
            <s xml:id="echoid-s4167" xml:space="preserve">Eſt vero in omnibus his locis occidentalibus
              <lb/>
            Declinatio verſus Ortum: </s>
            <s xml:id="echoid-s4168" xml:space="preserve">Linea, cui adſcriptus eſt numerus 5, </s>
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