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-div103" type="section" level="1" n="75">
          <pb o="51" file="0167" n="172" rhead="GEOMETRIA SVBTERRANEA."/>
        </div>
        <div xml:id="echoid-div104" type="section" level="1" n="76">
          <head xml:id="echoid-head93" xml:space="preserve">SCHOLION II.</head>
          <p>
            <s xml:id="echoid-s2791" xml:space="preserve">51. </s>
            <s xml:id="echoid-s2792" xml:space="preserve">Hactenus de apparatu geometriae ſ
              <unsure/>
            ubterraneae, et ſubſidiis
              <lb/>
            explicaui, ſequitur ut de ipſa fodinarum dimenſione agatur.
              <lb/>
            </s>
            <s xml:id="echoid-s2793" xml:space="preserve">cuius quaeſtionis duo caſus ſunt, alter, ubi compaſſo uti licet,
              <lb/>
            cum nempe ferri minera magneticae acus directionem non pertur-
              <lb/>
            bat, alter, in ipſis ferri fodinis metiendis locum habet.</s>
            <s xml:id="echoid-s2794" xml:space="preserve"/>
          </p>
          <head xml:id="echoid-head94" xml:space="preserve">PROBLEMA III.</head>
          <p style="it">
            <s xml:id="echoid-s2795" xml:space="preserve">52. </s>
            <s xml:id="echoid-s2796" xml:space="preserve">Fodinas metiri, in quibus acus magnetica a ferri minera non
              <lb/>
            turbatur.</s>
            <s xml:id="echoid-s2797" xml:space="preserve"/>
          </p>
          <head xml:id="echoid-head95" xml:space="preserve">RESOLVTIO PRIMA</head>
          <p>
            <s xml:id="echoid-s2798" xml:space="preserve">1. </s>
            <s xml:id="echoid-s2799" xml:space="preserve">Menſor in fodinam deſcendat, eiusque conditio-
              <lb/>
            nes contempletur, inprimis uti ſciat, ubi et qua ratione
              <lb/>
            inſtrumenta commode diſponi, et ad dimenſionem ad-
              <lb/>
            hiberi poſſint.</s>
            <s xml:id="echoid-s2800" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2801" xml:space="preserve">2. </s>
            <s xml:id="echoid-s2802" xml:space="preserve">Antequam menſionem aggrediatúr, praeparet ſibi
              <lb/>
            in pugillaribus claſſes numerorum inſcribendorum, quas
              <lb/>
            cum ſuis titulis laterculus ſequens, ſignificat.</s>
            <s xml:id="echoid-s2803" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2804" xml:space="preserve">3. </s>
            <s xml:id="echoid-s2805" xml:space="preserve">Funiculo cochlea firmato, uel manu in ſummo
              <lb/>
            putei ab operae ſocio prehenſo, demittatur ſuſpenſum ex
              <lb/>
            eodem pondus, quantum nempe recta altitudo permittit,
              <lb/>
            donec aliquem putei parietem feriat, menſureturque hu-
              <lb/>
            ius fili perpendicularis longitudo, et (ſubtracta tamen fu-
              <lb/>
            niculi portione, quae ſupra uel extra puteum extenſa fuit.)
              <lb/>
            </s>
            <s xml:id="echoid-s2806" xml:space="preserve">in pugillaribus ſcribatur, addito angulo, qui hic eſt 90 gr. </s>
            <s xml:id="echoid-s2807" xml:space="preserve">
              <lb/>
            cum titulo cadentis lineae. </s>
            <s xml:id="echoid-s2808" xml:space="preserve">(fallendes) nam hora in puteis
              <lb/>
            perpendicularibus n@lla obſeruatur. </s>
            <s xml:id="echoid-s2809" xml:space="preserve">Ceterum ſurgentium
              <lb/>
            et cadentium ſpecuum conditiones in noſtris indicibus
              <lb/>
            latinis literis S. </s>
            <s xml:id="echoid-s2810" xml:space="preserve">et C. </s>
            <s xml:id="echoid-s2811" xml:space="preserve">ſignificabuntur.</s>
            <s xml:id="echoid-s2812" xml:space="preserve"/>
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