Weidler, Johann Friedrich, Jo. Friderici Weidleri Tractatus de machinis hydraulicis toto terrarum orbe maximis Marlyensi et Londinensi et aliis rarioribus similibus in quo mensurae prope ipsas machinas notatae describuntur, et de viribus earum luculenter disseritur

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        <div xml:id="echoid-div73" type="section" level="1" n="54">
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            <s xml:id="echoid-s2422" xml:space="preserve">
              <pb o="19" file="0135" n="140" rhead="GEOMETRIA SUBTERRANEA."/>
            D, parallelum lineae dioptrarum. </s>
            <s xml:id="echoid-s2423" xml:space="preserve">Firmatur autem
              <lb/>
            ſuper fulcro, per foramen H immiſſo, et adhibetur,
              <lb/>
            tum ad linearum inclinationes ad horizontem, tum inpri-
              <lb/>
            mis ad conuerſiones uel directiones in mundi plagas, in
              <lb/>
            externa terrae ſuperficie definiendas. </s>
            <s xml:id="echoid-s2424" xml:space="preserve">Nam quando ex
              <lb/>
            funiculo HI libella ſuſpenditur, poteſt portio inſtrumenti
              <lb/>
            AE tamdiu attolli uel deprimi, donec pondus, ex cen-
              <lb/>
            tro libellae pendulum, angulum inclinationis ad horizon-
              <lb/>
            tem deſignet. </s>
            <s xml:id="echoid-s2425" xml:space="preserve">Similiter ſuſpenſo ex goniodicte compaſſo,
              <lb/>
            et moto inſtrumento dextrorſum uel ſiniſtrorſum, donec
              <lb/>
            ſub eodem acus magnetica plagam deſideratam indicet,
              <lb/>
            habetur ſitus illius in eandem mundi plagam.</s>
            <s xml:id="echoid-s2426" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div75" type="section" level="1" n="55">
          <head xml:id="echoid-head72" xml:space="preserve">CONSECTARIVM.</head>
          <p>
            <s xml:id="echoid-s2427" xml:space="preserve">35. </s>
            <s xml:id="echoid-s2428" xml:space="preserve">Quodſi igitur quis, obtento inſtrumenti ſitu, per dioptras
              <lb/>
            proſpiciat, poteſt in patente campo, baculis conſtitu-
              <lb/>
            tis, lineam in quodlibet horizontis punctum conuerſam de-
              <lb/>
            finire. </s>
            <s xml:id="echoid-s2429" xml:space="preserve">Ceterum ligneum eſt, ut eo euadat leuius. </s>
            <s xml:id="echoid-s2430" xml:space="preserve">Habet idem
              <lb/>
            uſum pro libellatione locorum inſtituenda; </s>
            <s xml:id="echoid-s2431" xml:space="preserve">item pro deſcri-
              <lb/>
            bendis arearum ichnographiis, ſiquidem angulos a lateribus
              <lb/>
            figurae cuiusdam comprehenſos acus indicat, qui in charta
              <lb/>
            inſtrumento lineationis accurate iterum ſiſti poſſunt. </s>
            <s xml:id="echoid-s2432" xml:space="preserve">Gonf-
              <lb/>
            dicta §. </s>
            <s xml:id="echoid-s2433" xml:space="preserve">132. </s>
            <s xml:id="echoid-s2434" xml:space="preserve">Geom. </s>
            <s xml:id="echoid-s2435" xml:space="preserve">reſol. </s>
            <s xml:id="echoid-s2436" xml:space="preserve">3.</s>
            <s xml:id="echoid-s2437" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div76" type="section" level="1" n="56">
          <head xml:id="echoid-head73" xml:space="preserve">DEFINITIO XVI.</head>
          <p>
            <s xml:id="echoid-s2438" xml:space="preserve">36.</s>
            <s xml:id="echoid-s2439" xml:space="preserve">Compaſſus iacens (der Setz - Compaſſ.) </s>
            <s xml:id="echoid-s2440" xml:space="preserve">eſt arcula rotunda,
              <lb/>
              <note position="right" xlink:label="note-0135-01" xlink:href="note-0135-01a" xml:space="preserve">Figur. 14.</note>
            ex aere uel ligno parata, in cuius medio, intra caui-
              <lb/>
            tatem circularem, acus magnetica ſuper acuto ſtilo iacet,
              <lb/>
            peripheria uero in portiones ſuas horarias, quemadm o-
              <lb/>
            dum figura indicat, diuiſa eſt. </s>
            <s xml:id="echoid-s2441" xml:space="preserve">Praeterea circa pyxidem
              <lb/>
            magneticam, in medio inſertam, regula AB mobilis eſt,
              <lb/>
            cuius alterum erus uerſus A ſigno, v. </s>
            <s xml:id="echoid-s2442" xml:space="preserve">g. </s>
            <s xml:id="echoid-s2443" xml:space="preserve">crucis, ſignatur.</s>
            <s xml:id="echoid-s2444" xml:space="preserve"/>
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