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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        <div xml:id="echoid-div294" type="section" level="1" n="294">
          <note position="right" xml:space="preserve">
            <pb o="399" file="0413" n="413" rhead="DE MAGNITUDINE TERRÆ."/>
          Angulus a e m # 57 gr. 42.
            <lb/>
          Angulus e m a # 60 gr. 25`.
            <lb/>
          Latus a e datum # 475, 0, 0
            <lb/>
          Ex quibus ope Regularum Trigonometriæ ſubducitur e m inter- \\ vallum inter Douſæ arcem & pagum Soeterwoudam # 481, 7, 4.
            <lb/>
          </note>
        </div>
        <div xml:id="echoid-div295" type="section" level="1" n="295">
          <head xml:id="echoid-head358" xml:space="preserve">
            <emph style="sc">Problema</emph>
          III.</head>
          <head xml:id="echoid-head359" style="it" xml:space="preserve">Triangulum i e m, jungens Leidam, Douſæ arcem &
            <lb/>
          Soeterwoudam.</head>
          <note position="right" xml:space="preserve">
            <lb/>
          Obſervatus eſt angulus i e m # 147. gr. 13`.
            <lb/>
          Datur latus i e in Probl. I. # 660, 5, 7.
            <lb/>
          Et in Problemate II. datur latus e m # 481, 7, 4.
            <lb/>
          Adeoque datis duobus lateribus cum angulo intercep- \\ to dabunt regulæ Trigonometricæ
            <lb/>
          Latus i m # 1097, 1, 0.
            <lb/>
          Et erit angulus e m i # 19 gr. 1`, 40``.
            <lb/>
          Et angulus e i m # 13 gr. 45`, 20``.
            <lb/>
          </note>
          <p>
            <s xml:id="echoid-s9318" xml:space="preserve">Adeoque ſecundum hanc menſuram eſt diſtantia inter Leidam & </s>
            <s xml:id="echoid-s9319" xml:space="preserve">
              <lb/>
            Soeterwoudam 1097 perticarum, 1 pedis, & </s>
            <s xml:id="echoid-s9320" xml:space="preserve">0 {17/100} pollicis: </s>
            <s xml:id="echoid-s9321" xml:space="preserve">aſt Snel-
              <lb/>
            lius hanc diſtantiam antea determinavit 1092, 3, 3, differentia eſt
              <lb/>
            4 perticarum 7 pedum, 6 pollicum cum fractione quadam, quæ
              <lb/>
            differentia admodum notabilis eſt: </s>
            <s xml:id="echoid-s9322" xml:space="preserve">Commendat vero Snellius fiden-
              <lb/>
            dum eſſe maxime ultimæ menſuræ, quia capta eſt ſupra glaciem
              <lb/>
            lævigatiſſimam diſtantia a e, repetitis vicibus & </s>
            <s xml:id="echoid-s9323" xml:space="preserve">magnâ cum curâ.
              <lb/>
            </s>
            <s xml:id="echoid-s9324" xml:space="preserve">Quoniam igitur prima baſis totius operis multo longior depre-
              <lb/>
            henditur, quam Snellius eam primo poſuerat, non poterant
              <lb/>
            non diſtantiæ reliquorum locorum multum diſcrepare a menſu-
              <lb/>
            ra ante ſtabilita: </s>
            <s xml:id="echoid-s9325" xml:space="preserve">Tuto igitur ponemus diſtantiam i m eſſe pertica
              <lb/>
            rum 1097, 1, 0.</s>
            <s xml:id="echoid-s9326" xml:space="preserve"/>
          </p>
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