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

Table of contents

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[81.] EXPERIMENTUM LXI.
Page: 131 (117)
[82.] EXPERIMENTUM LXII.
Page: 131 (117)
[83.] EXPERIMENTUM. LXIII.
Page: 131 (117)
[84.] EXPERIMENTUM LXIV.
Page: 132 (118)
[85.] EXPERIMENTUM LXV.
Page: 132 (118)
[86.] EXPERIMENTUM LXVI.
Page: 134 (120)
[87.] EXPERIMENTUM LXVII.
Page: 135 (121)
[88.] EXPERIMENTUM LXVIII.
Page: 136 (122)
[89.] EXPERIMENTUM LXIX.
Page: 136 (122)
[90.] EXPERIMENTUM LXX.
Page: 137 (123)
[91.] EXPERIMENTUM LXXI.
Page: 137 (123)
[92.] EXPERIMENTUM LXXII.
Page: 137 (123)
[93.] EXPERIMENTUM LXXIII.
Page: 141 (127)
[94.] DE METHODO ARMANDI MAGNETES.
Page: 144 (130)
[95.] EXPERIMENTUM LXXIV.
Page: 146 (132)
[96.] EXPERIMENTUM. LXXV.
Page: 147 (133)
[97.] EXPERIMENTUM LXXVI.
Page: 147 (133)
[98.] EXPERIMENTUM LXXVII.
Page: 148 (134)
[99.] EXPERIMENTUM LXXVIII.
Page: 148 (134)
[100.] EXPERIMENTUM. LXXIX.
Page: 148 (134)
[101.] EXPERIMENTUM LXXX.
Page: 149 (135)
[102.] CAPUT TERTIUM. De Directione Magnetis & Ferri ſuper ipſo ducti.
Page: 150 (136)
[103.] EXPERIMENTUM LXXXI.
Page: 151 (137)
[104.] EXPERIMENTUM LXXXII.
Page: 152 (138)
[105.] EXPERIMENTUM LXXXIII.
Page: 153 (139)
[106.] EXPERIMENTUM LXXXIV.
Page: 154 (140)
[107.] EXPERIMENTUM LXXXV.
Page: 154 (140)
[108.] EXPERIMENTUM LXXXVI.
Page: 155 (141)
[109.] EXPERIMENTUM LXXXVII.
Page: 155 (141)
[110.] EXPERIMENTUM LXXXVIII.
Page: 155 (141)
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              <pb o="191" file="0205" n="205" rhead="DE MAGNETE."/>
            qui acubus diverſæ longitudinis explorandis inſerviunt: </s>
            <s xml:id="echoid-s4441" xml:space="preserve">inſiſtit pedi
              <lb/>
            firmo ligneo L L L, ope trium ænearum cochlearum ita dirigendo,
              <lb/>
            ut Tabula accurate horizonti perpendicularis ponatur: </s>
            <s xml:id="echoid-s4442" xml:space="preserve">hoc explo-
              <lb/>
            ratur ope penduli D C in cuſpidem deſinentis, quæ apici promi-
              <lb/>
            nentis ſtyli B reſpondet, ſimulac tabula bene eſt locata: </s>
            <s xml:id="echoid-s4443" xml:space="preserve">verticilli
              <lb/>
            E ope pendulum C D abbreviari elongarique poteſt. </s>
            <s xml:id="echoid-s4444" xml:space="preserve">Omnium qua-
              <lb/>
            drantum eſt centrum commune I, in quo haud exiguum artificium
              <lb/>
            latet. </s>
            <s xml:id="echoid-s4445" xml:space="preserve">lamina cuprea denſa firme annexa eſt lateri Tabulæ, ipſi im-
              <lb/>
            poſita ſunt duo capita ſeu excipula, quæ quia non ſatis clare con-
              <lb/>
            ſpici poſſunt, inferius depicta ſunt N, M: </s>
            <s xml:id="echoid-s4446" xml:space="preserve">utrumque in O laminam
              <lb/>
            politiſſimam vitream planamque continet, ſupra quam in capitis
              <lb/>
            commiſſurâ axis Acus poſitus libere convertitur abſque ullo fere at-
              <lb/>
            tritu; </s>
            <s xml:id="echoid-s4447" xml:space="preserve">ſupra ſuperficiem vitri enim axim mobiliſſime circumvertiob-
              <lb/>
            ſervaverunt recte Normannus & </s>
            <s xml:id="echoid-s4448" xml:space="preserve">Whiſtonus: </s>
            <s xml:id="echoid-s4449" xml:space="preserve">ex hac deſcriptione ſatis
              <lb/>
            intelligi poterit machina, accedamus igitur ad Acus, quarum non-
              <lb/>
            nullas præparavi diverſæ longitudinis & </s>
            <s xml:id="echoid-s4450" xml:space="preserve">fabricæ. </s>
            <s xml:id="echoid-s4451" xml:space="preserve">longiſſima S S erat 4
              <lb/>
            pedum, in medio {1/2} pollicem lata, {3/12} pollic. </s>
            <s xml:id="echoid-s4452" xml:space="preserve">craſſa, utrimque de-
              <lb/>
            ſinens in apices acutiſſimos: </s>
            <s xml:id="echoid-s4453" xml:space="preserve">per medium, hoc eſt per centrum gra-
              <lb/>
            vitatis tranſibat axis indurati chalybis, tenuis, perfecte rotundus,
              <lb/>
            ac politiſſimus pp, ita Acus impoſita excipulis M N, lubriciſſime & </s>
            <s xml:id="echoid-s4454" xml:space="preserve">li-
              <lb/>
            bere poterat converti: </s>
            <s xml:id="echoid-s4455" xml:space="preserve">attamen præterea deſiderabatur, ut hæc Acus
              <lb/>
            excepta capitibus, ab utraque ſui parte foret accurate æquilibrata,
              <lb/>
            & </s>
            <s xml:id="echoid-s4456" xml:space="preserve">in ſitu poſita horizontali, vel in quocunque alio obliquo, abſo-
              <lb/>
            lute quieſceret: </s>
            <s xml:id="echoid-s4457" xml:space="preserve">hoc facile dictu & </s>
            <s xml:id="echoid-s4458" xml:space="preserve">conceptu, aſt factu difficilius
              <lb/>
            nihil, non enim, ut hujus indolis præparetur Acus, ſumma duntaxat
              <lb/>
            poſtulatur dexteritas, ſed improbus labor, conjunctus cum infan-
              <lb/>
            do tædio, quo maxima artificum patientia opprimeretur, nam me-
              <lb/>
            dium axeos per centrum gravitatis tranſire debet, quod ut obtinea-
              <lb/>
            tur accuratiſſime, nunc aliquid â latere acus dextro, nunc â ſini-
              <lb/>
            ſtro limâ abradendum eſt, nunc iterum aliquid a parte ſuperiori;
              <lb/>
            </s>
            <s xml:id="echoid-s4459" xml:space="preserve">nunc ab inferiori, atque non niſi poſt infinita tentamina voti com-
              <lb/>
            potes evadimus: </s>
            <s xml:id="echoid-s4460" xml:space="preserve">difficultates ejuſmodi etiam experti fuerunt Whi-
              <lb/>
            ſtonus, & </s>
            <s xml:id="echoid-s4461" xml:space="preserve">poſtea Grahamus in Philoſ. </s>
            <s xml:id="echoid-s4462" xml:space="preserve">Tranſ. </s>
            <s xml:id="echoid-s4463" xml:space="preserve">N°. </s>
            <s xml:id="echoid-s4464" xml:space="preserve">389. </s>
            <s xml:id="echoid-s4465" xml:space="preserve">præparatâ
              <lb/>
            tamen Acu dubitavi valde, an præter binos memoratos viros aliquis
              <lb/>
            unquam bonam Acum Inclinatoriam poſſederit, neminementionem
              <lb/>
            faciente quanto cum labore præparari modo poſſit; </s>
            <s xml:id="echoid-s4466" xml:space="preserve">imo hinc </s>
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