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-div65" type="section" level="1" n="48">
          <p style="it">
            <s xml:id="echoid-s2259" xml:space="preserve">
              <pb o="14" file="0130" n="135" rhead="GEOMETRIA SVBTERRANEA."/>
            ſus ex funiculis ea lege, ut ſemper notae S et M quae ſeptemtrio-
              <lb/>
            nali et meridionali plagae adſcriptae ſunt, adeoque tota linea S M
              <lb/>
            incidant in axem, ſiue lineam directionis, ipſius fodinae, cuius po-
              <lb/>
            ſitus quaeritur. </s>
            <s xml:id="echoid-s2260" xml:space="preserve">Et continuo quidem ſignum S prorſum, ſiue in ante-
              <lb/>
            riorem partem, uertitur. </s>
            <s xml:id="echoid-s2261" xml:space="preserve">Quando igitur inuerſe ſcribuntur ſigna
              <lb/>
            Occ. </s>
            <s xml:id="echoid-s2262" xml:space="preserve">et Or. </s>
            <s xml:id="echoid-s2263" xml:space="preserve">acus magnetica, ea parte ſua, quae in ſeptentrionem reſpi-
              <lb/>
            cit, monſtrat plagam, in quam fodina porrigitur. </s>
            <s xml:id="echoid-s2264" xml:space="preserve">Ingenioſe autem
              <lb/>
            compaſſum ſuum ita compoſuere finitores, quia ipſa nunc acus certis-
              <lb/>
            ſimum et ſubtiliſſimum plagae praebet indicem. </s>
            <s xml:id="echoid-s2265" xml:space="preserve">Quantum enim linea
              <lb/>
            S M deflectit a meridiana, tantum etiam acus ab eadem recedet.
              <lb/>
            </s>
            <s xml:id="echoid-s2266" xml:space="preserve">Si ergo S in occaſum collineet, acus indice ſuo ſuper Occ. </s>
            <s xml:id="echoid-s2267" xml:space="preserve">conſiſtet,
              <lb/>
            et occaſum monſtrabit, et ſimiliter in intermediis lineis ſeſe geret,
              <lb/>
            cuius conuerſae ſcriptionis effectus, uſu talis pyxidis, omnium clariſſi-
              <lb/>
            me poteſt oſtendi.</s>
            <s xml:id="echoid-s2268" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div66" type="section" level="1" n="49">
          <head xml:id="echoid-head66" xml:space="preserve">DEFINITIO XIV.</head>
          <p>
            <s xml:id="echoid-s2269" xml:space="preserve">29. </s>
            <s xml:id="echoid-s2270" xml:space="preserve">Inſtrumentum lineationis (das Zuleg - oder Zeichen - Inſtru-
              <lb/>
              <note position="left" xlink:label="note-0130-01" xlink:href="note-0130-01a" xml:space="preserve">Fig. 5.</note>
            ment it. </s>
            <s xml:id="echoid-s2271" xml:space="preserve">der Zulege-Compaſ) eſt loculamentum aeneum
              <lb/>
            rectangulum, dioptras D R habens, in quo compaſſus
              <lb/>
            pendalus, ex annulo ſuo exemtus, horizontali ſitu poni et
              <lb/>
            firmari poteſt. </s>
            <s xml:id="echoid-s2272" xml:space="preserve">Linea circuli horarii S M, imponitur
              <lb/>
            lineae D R, ſuper qua dioptrae (ſeſquidigitum altae, et
              <lb/>
            circa axem mobiles, ita ut demitti, et eleuari iterum poſ-
              <lb/>
            ſint) conſiſtunt. </s>
            <s xml:id="echoid-s2273" xml:space="preserve">Longitudo organi eſt 6 uel 7 latitudo
              <lb/>
            4 digitorum; </s>
            <s xml:id="echoid-s2274" xml:space="preserve">diſtinctior eiusdem imago Fig. </s>
            <s xml:id="echoid-s2275" xml:space="preserve">V. </s>
            <s xml:id="echoid-s2276" xml:space="preserve">tab. </s>
            <s xml:id="echoid-s2277" xml:space="preserve">4.
              <lb/>
            </s>
            <s xml:id="echoid-s2278" xml:space="preserve">ob oculos ponitur.</s>
            <s xml:id="echoid-s2279" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div68" type="section" level="1" n="50">
          <head xml:id="echoid-head67" xml:space="preserve">SCHOLION I.</head>
          <p style="it">
            <s xml:id="echoid-s2280" xml:space="preserve">30. </s>
            <s xml:id="echoid-s2281" xml:space="preserve">Vſus eius eſt, ut cluctus, compaſſo penſili inuenti, horizonta-
              <lb/>
            liter in charta delineari queant, de quo deinceps plura; </s>
            <s xml:id="echoid-s2282" xml:space="preserve">quo-
              <lb/>
            niam autem in charta, pro ducendis rectis lineis, officium facit,
              <lb/>
            commodius erit, ſi baſis ex duriore ligno u. </s>
            <s xml:id="echoid-s2283" xml:space="preserve">c. </s>
            <s xml:id="echoid-s2284" xml:space="preserve">hebeno paretur. </s>
            <s xml:id="echoid-s2285" xml:space="preserve">Aes
              <lb/>
            enim chartam maculare ſolet.</s>
            <s xml:id="echoid-s2286" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div69" type="section" level="1" n="51">
          <head xml:id="echoid-head68" xml:space="preserve">SCHOLION II.</head>
          <p style="it">
            <s xml:id="echoid-s2287" xml:space="preserve">31. </s>
            <s xml:id="echoid-s2288" xml:space="preserve">Debet igitur ſolicite cum penſili compaſſo componi, ut perfectus
              <lb/>
              <note position="left" xlink:label="note-0130-02" xlink:href="note-0130-02a" xml:space="preserve">Figur. 6.</note>
            lineae S M Fig. </s>
            <s xml:id="echoid-s2289" xml:space="preserve">6. </s>
            <s xml:id="echoid-s2290" xml:space="preserve">et laterum AE, DR, BC, Fig. </s>
            <s xml:id="echoid-s2291" xml:space="preserve">5 </s>
          </p>
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