Clavius, Christoph, Gnomonices libri octo, in quibus non solum horologiorum solariu[m], sed aliarum quo[quam] rerum, quae ex gnomonis umbra cognosci possunt, descriptiones geometricè demonstrantur

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            <s xml:id="echoid-s9936" xml:space="preserve">
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            dicam eius quantit atem non contineatur, animo tamen ipſum concipere licebit, Igitur angulus E A F.
              <lb/>
            </s>
            <s xml:id="echoid-s9937" xml:space="preserve">altitudini poli æqualis crit, cum E A F, A E F, vni recto ſint æquales, & </s>
            <s xml:id="echoid-s9938" xml:space="preserve">A E F, ſit complemento al-
              <lb/>
              <note position="left" xlink:label="note-0174-01" xlink:href="note-0174-01a" xml:space="preserve">82. primi.</note>
            titudinis poli æqualis; </s>
            <s xml:id="echoid-s9939" xml:space="preserve">ac propterea ſi triangulum E A F, intelligatur circa lineam meridianam A E, cir-
              <lb/>
            cumduci, quoad rectum ſit ad planum borologij, & </s>
            <s xml:id="echoid-s9940" xml:space="preserve">in plano Meridiani exiſtat, erit A F, axis mundi;
              <lb/>
            </s>
            <s xml:id="echoid-s9941" xml:space="preserve">
              <figure xlink:label="fig-0174-01" xlink:href="fig-0174-01a" number="127">
                <image file="0174-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0174-01"/>
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              <note position="left" xlink:label="note-0174-02" xlink:href="note-0174-02a" xml:space="preserve">10</note>
              <note position="left" xlink:label="note-0174-03" xlink:href="note-0174-03a" xml:space="preserve">20</note>
              <note position="left" xlink:label="note-0174-04" xlink:href="note-0174-04a" xml:space="preserve">30</note>
              <note position="left" xlink:label="note-0174-05" xlink:href="note-0174-05a" xml:space="preserve">40</note>
            quia in plano Meridiani cum meridiana linea Horizontis, quæ ipſi A B, in plano horologij æquidiſt@t,
              <lb/>
              <note position="left" xlink:label="note-0174-06" xlink:href="note-0174-06a" xml:space="preserve">16. vndec.</note>
            (propterea quòd ambæ ſint ſectiones factæ à Meridiano in planis parallelis) angulum facit angulo E A F,
              <lb/>
            altitudinis poli æqualem, nempe externum interno. </s>
            <s xml:id="echoid-s9942" xml:space="preserve">Quocirca rectæ F E, G H, ad axem F G, perpendicu-
              <lb/>
              <note position="left" xlink:label="note-0174-07" xlink:href="note-0174-07a" xml:space="preserve">29. primi.</note>
              <note position="left" xlink:label="note-0174-08" xlink:href="note-0174-08a" xml:space="preserve">50</note>
            lares, communes ſectiones erunt Meridiani, & </s>
            <s xml:id="echoid-s9943" xml:space="preserve">Aequatoris, ita vt vtrumque punctorum F, G, pro cen-
              <lb/>
            tro mundi ſumatur. </s>
            <s xml:id="echoid-s9944" xml:space="preserve">Ac propterea, vt in hac propoſ. </s>
            <s xml:id="echoid-s9945" xml:space="preserve">oſtenſum eſt, circuli horarij occurrent plano horo-
              <lb/>
            logij in punctis, quæ in rectis C D, I K, reperimus, & </s>
            <s xml:id="echoid-s9946" xml:space="preserve">F M, erit ſtylus, eiuſ{q́ue} locus in M. </s>
            <s xml:id="echoid-s9947" xml:space="preserve">Sunt enim triã-
              <lb/>
            gula A E F, A H G, ita conſtructa hoc loco, vt triangulum H I D, in ſuperiori horologio huius propoſ.</s>
            <s xml:id="echoid-s9948" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s9949" xml:space="preserve">IN hoc propoſito exemplo, quia altitudo poli eſt magna ſatis, continetur centrum horologij A, ad
              <lb/>
            quod omnes lineæ horariæ tendunt. </s>
            <s xml:id="echoid-s9950" xml:space="preserve">Quod eo conſilio factum eſt, vt experientia etiam diſceres, rectè hac
              <lb/>
            ratione horologia deſcribi. </s>
            <s xml:id="echoid-s9951" xml:space="preserve">Liquido verò conſtat, ſi centrum in planum horologij non cadit, ſextam horã,
              <lb/>
            quæ per centrum horologij neceſſario ducitur ad meridianam lineam perpendicularis, deſcribi non poſſe.
              <lb/>
            </s>
            <s xml:id="echoid-s9952" xml:space="preserve">
              <note position="left" xlink:label="note-0174-09" xlink:href="note-0174-09a" xml:space="preserve">Deſctiptio hoto
                <lb/>
              logii horizonta
                <lb/>
              lis, cum polial-
                <lb/>
              titudovalde ma
                <lb/>
              gna eſt.</note>
            Atque hæc de remedio prioris incommodi.</s>
            <s xml:id="echoid-s9953" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s9954" xml:space="preserve">QVOD autem attinet ad poſterius incommodum, illud ita leuabimus. </s>
            <s xml:id="echoid-s9955" xml:space="preserve">Sit rurſus in aliquo plano me
              <lb/>
            ridiana linea A B, & </s>
            <s xml:id="echoid-s9956" xml:space="preserve">ſtatuatur A, centrum horologij. </s>
            <s xml:id="echoid-s9957" xml:space="preserve">Conſtituatur ad rectam A B, in A, angulus </s>
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