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-div258" type="section" level="1" n="258">
          <p>
            <s xml:id="echoid-s8995" xml:space="preserve">
              <pb o="372" file="0386" n="386" rhead="DISSERTATIO"/>
            giis, quæ haud facile vitare poſſis, niſi ſingulis in locis diutiuſcu-
              <lb/>
            le hæreas, aut obſervationes aliquoties iteres. </s>
            <s xml:id="echoid-s8996" xml:space="preserve">Ut ſunt ventus in
              <lb/>
            ſummo aëre vehementior, cum etiam ad turrium baſin eum aut mo-
              <lb/>
            dicum, aut perſæpe nullum perſentiſcas: </s>
            <s xml:id="echoid-s8997" xml:space="preserve">ſtatio non ſemper in tur-
              <lb/>
            ris medio, ſed modo in hoc, modo in iſto angulo prout ſtructuræ
              <lb/>
            commoditas illud permittet aut locorum obſervandorum ſitus exi-
              <lb/>
            get. </s>
            <s xml:id="echoid-s8998" xml:space="preserve">Atque alia id genus compluria, quæ uſus te facilius docere
              <lb/>
            poſſit, quam ego verbis queam exprimere. </s>
            <s xml:id="echoid-s8999" xml:space="preserve">Neque vero minimam
              <lb/>
            difficultatem objecerit locorum ignorantia, cum ipſi ſpeculatores
              <lb/>
            turrim aliquam vicinam pro quæſita reponunt, ne quidquam igno-
              <lb/>
            rare videantur. </s>
            <s xml:id="echoid-s9000" xml:space="preserve">Atque ea ſane maxime res nos omnes triangulian-
              <lb/>
            gulos obſervare coëgit, ut tum demum legitimam obſervationem
              <lb/>
            probaremus, cum nobisad numeros veniunt. </s>
            <s xml:id="echoid-s9001" xml:space="preserve">Denique omniatan-
              <lb/>
            ta cum cura & </s>
            <s xml:id="echoid-s9002" xml:space="preserve">diligentia à nobis ſunt obita, ut tot moleſtiis & </s>
            <s xml:id="echoid-s9003" xml:space="preserve">dif-
              <lb/>
            ficultatibus fatigato, pene coeptum opus deſerere conſilium fuerit,
              <lb/>
            niſi publica utilitas, & </s>
            <s xml:id="echoid-s9004" xml:space="preserve">tot jam ſeculis fatigata tam nobilis cura ſti-
              <lb/>
            mulos mihi addidiſſet, & </s>
            <s xml:id="echoid-s9005" xml:space="preserve">rurſum calamum in manum, corpus & </s>
            <s xml:id="echoid-s9006" xml:space="preserve">
              <lb/>
            oculorum aciem in turrium faſtigia attollere coëgiſſet. </s>
            <s xml:id="echoid-s9007" xml:space="preserve">Hæc enim
              <lb/>
            ipſa, quæ hic afſero, vix milleſima pars ſunt laboris, moleſtiæ, & </s>
            <s xml:id="echoid-s9008" xml:space="preserve">
              <lb/>
            impenſarum, quas exantlavimus. </s>
            <s xml:id="echoid-s9009" xml:space="preserve">Et niſi animum contra omne
              <lb/>
            tœdium obfirmaviſſem, ad finem optatum perducere nunquampo-
              <lb/>
            tuiſſem. </s>
            <s xml:id="echoid-s9010" xml:space="preserve">Plura monere nunc ſuperſedeo & </s>
            <s xml:id="echoid-s9011" xml:space="preserve">ad inſtitutum rever-
              <lb/>
            tor.</s>
            <s xml:id="echoid-s9012" xml:space="preserve"/>
          </p>
          <note position="right" xml:space="preserve">
            <lb/>
          Ex angulis igitur & baſe A E datis, latera quoque reliqua per trian- \\ gulorum canones dabuntur. Videlicet diſtantia inter Leidam & \\ Goudam E S # 5897. # 8.
            <lb/>
          Inter Hagam & Goudam A S # 7594. # 3.
            <lb/>
          </note>
        </div>
        <div xml:id="echoid-div259" type="section" level="1" n="259">
          <head xml:id="echoid-head292" xml:space="preserve">II.
            <emph style="sc">Problema</emph>
          .</head>
          <head xml:id="echoid-head293" xml:space="preserve">Triangulum E S R. Leida, Gouda, Dordracum.</head>
          <note position="right" xml:space="preserve">
            <lb/>
          Per Problema I datur diſtantia inter Leidam, & \\ Goudam E S # 5897. # 8.
            <lb/>
          Ex obſervatis autem datur angulus R E S # 25 gr. # 49 ſcr.
            <lb/>
          </note>
        </div>
      </text>
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