Clavius, Christoph, In Sphaeram Ioannis de Sacro Bosco commentarius

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        <div xml:id="echoid-div633" type="section" level="1" n="212">
          <pb o="298" file="334" n="335" rhead="Comment. in II. Cap. Sphæræ."/>
        </div>
        <div xml:id="echoid-div634" type="section" level="1" n="213">
          <head xml:id="echoid-head223" xml:space="preserve">SCHEMA ORIZONTIS RECTI
            <lb/>
          ET OBLIQVI.</head>
          <figure number="86">
            <image file="334-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/334-01"/>
          </figure>
          <p style="it">
            <s xml:id="echoid-s12536" xml:space="preserve">ZENITH autem capitis noſtri ſemper eſt polus Horizontis. </s>
            <s xml:id="echoid-s12537" xml:space="preserve">Vn-
              <lb/>
              <note position="left" xlink:label="note-334-01" xlink:href="note-334-01a" xml:space="preserve">Zenith ca-
                <lb/>
              pitis eſſe po
                <lb/>
              lum Hori-
                <lb/>
              zontis.</note>
            de ex his patet, quòd quanta eſt eleuatio poli mundi ſupra Horizontem,
              <lb/>
            tanta eſt diſtantia Zenith ab Aequinoctiali, quod ſic patet. </s>
            <s xml:id="echoid-s12538" xml:space="preserve">Cum in quo-
              <lb/>
            libet die naturali uterque Colurus bis iungatur Meridiano, ſiue idem ſit
              <lb/>
            quod Meridianus, quidquid de uno probatur, & </s>
            <s xml:id="echoid-s12539" xml:space="preserve">de reliquo. </s>
            <s xml:id="echoid-s12540" xml:space="preserve">Sumatur igi-
              <lb/>
            tur quarta pars Coluri diſtinguentis Solſtitia, quæ eſt ab Aequinoctiali
              <lb/>
              <note position="left" xlink:label="note-334-02" xlink:href="note-334-02a" xml:space="preserve">Eleuatio
                <lb/>
              poli ſupra
                <lb/>
              Horizõtem
                <lb/>
              æqualis eſt
                <lb/>
              diſtãtiæ Ze
                <lb/>
              nith ab Ae-
                <lb/>
              quatore.</note>
            uſque ad polum mundi: </s>
            <s xml:id="echoid-s12541" xml:space="preserve">Sumatur iterum quarta pars eiuſdem Coluri, quę
              <lb/>
            eſt à Zcnith uſque ad Horizontem, cum Zenith ſi polus Horizontis. </s>
            <s xml:id="echoid-s12542" xml:space="preserve">Iſtæ
              <lb/>
            duę quartę, cum ſint quartæ eiuſdem circuli, inter ſe ſunt æquales: </s>
            <s xml:id="echoid-s12543" xml:space="preserve">Sed ſi
              <lb/>
            ab ęqualibus æqualia demantur, uel idem commune, reſidua ſunt ęqua-
              <lb/>
            lia. </s>
            <s xml:id="echoid-s12544" xml:space="preserve">Dempto communi igitur arcu, ſcilicet, qui eſt inter Zenith, & </s>
            <s xml:id="echoid-s12545" xml:space="preserve">polum
              <lb/>
            mundi, reſidua erunt æqualia, ſcilicet eleuatio poli mundi ſupra Horizon-
              <lb/>
            tem, & </s>
            <s xml:id="echoid-s12546" xml:space="preserve">diſtantia Zenith ab Aequinoctiali.</s>
            <s xml:id="echoid-s12547" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div636" type="section" level="1" n="214">
          <head xml:id="echoid-head224" xml:space="preserve">COMMENTARIVS.</head>
          <p>
            <s xml:id="echoid-s12548" xml:space="preserve">
              <emph style="sc">Ex</emph>
              <emph style="sc">Eo</emph>
            quod Zenith, ſeu uertex capitis noſtri perpetuo polus eſt Hori-
              <lb/>
              <figure xlink:label="fig-334-02" xlink:href="fig-334-02a" number="87">
                <image file="334-02" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/334-02"/>
              </figure>
            zontis, ita ut à Zenith quaqua uerſus ad Horizo-
              <lb/>
            tem uſque ſit Quadrans circuli, demonſtrat hoc
              <lb/>
            loco auctor, tantam eſſe eleuationem poli ſupra
              <lb/>
            Horizontẽ, quanta eſt diſtantia Zenith ab Aequa-
              <lb/>
            tore; </s>
            <s xml:id="echoid-s12549" xml:space="preserve">quod nos ſupra in Meridiano circulo, ut no-
              <lb/>
            tum, aſſumpſimus. </s>
            <s xml:id="echoid-s12550" xml:space="preserve">Demonſtratio uero aucto-
              <lb/>
            ris culibet perſpicua eſſe poteſt in hac figura, in
              <lb/>
            qua circulus A B C D, ſit Colurus ſolſtitio-
              <lb/>
            rum idem, qui Meridianus, Horizon, A E C;
              <lb/>
            </s>
            <s xml:id="echoid-s12551" xml:space="preserve">Aequator B E I; </s>
            <s xml:id="echoid-s12552" xml:space="preserve">poli mundi, G, H; </s>
            <s xml:id="echoid-s12553" xml:space="preserve">Zenith
              <lb/>
            F; </s>
            <s xml:id="echoid-s12554" xml:space="preserve">Quadrans ab Aequatore per Zenith uſque </s>
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