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-s18256" xml:space="preserve">
              <pb o="270" file="0286" n="286" rhead="GNOMONICES"/>
            huius libri cõmunes ſectiones ſunt Aequatoris, & </s>
            <s xml:id="echoid-s18257" xml:space="preserve">maximorũ circulorũ per polos mundi, & </s>
            <s xml:id="echoid-s18258" xml:space="preserve">horas
              <lb/>
            Italicas paralleli ♋, tranſeuntium, inſtar circulorũ horariorũ à meridie, vel media nocte, ſecabitur
              <lb/>
            linea æquinoctialis in punctis, per quæ ad ipſam perpendiculares lineæ eductæ ſecabunt tropicum
              <lb/>
            ♋, in horis Italicis, ſiue ab occaſu Solis, cum hæ perpendiculares ſint lineæ horariæ ab occaſu So-
              <lb/>
            lis, Sole exiſtente in principio ♋, ac ſi eſſent communes ſectiones plan@ horologii, & </s>
            <s xml:id="echoid-s18259" xml:space="preserve">circulorum
              <lb/>
            maximorum per polos mundi, & </s>
            <s xml:id="echoid-s18260" xml:space="preserve">horas Italicas in tropico ♋, tranſeuntium, vt ex ſupra demonſtra
              <lb/>
            tis liquet. </s>
            <s xml:id="echoid-s18261" xml:space="preserve">Quòd ſi per centrum circuli F G H I, ducatur recta G I, æquinoctiali lineæ parallela, nõ
              <lb/>
              <figure xlink:label="fig-0286-01" xlink:href="fig-0286-01a" number="199">
                <image file="0286-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0286-01"/>
              </figure>
              <note position="left" xlink:label="note-0286-01" xlink:href="note-0286-01a" xml:space="preserve">10</note>
              <note position="left" xlink:label="note-0286-02" xlink:href="note-0286-02a" xml:space="preserve">20</note>
              <note position="left" xlink:label="note-0286-03" xlink:href="note-0286-03a" xml:space="preserve">30</note>
              <note position="left" xlink:label="note-0286-04" xlink:href="note-0286-04a" xml:space="preserve">40</note>
            cadent horæ in arcubus a G, b I, (quales ſunt in noſtro exemplo 23. </s>
            <s xml:id="echoid-s18262" xml:space="preserve">10. </s>
            <s xml:id="echoid-s18263" xml:space="preserve">& </s>
            <s xml:id="echoid-s18264" xml:space="preserve">9.) </s>
            <s xml:id="echoid-s18265" xml:space="preserve">in planum horologii
              <lb/>
            ſuperioris, cum circulus horæ 6. </s>
            <s xml:id="echoid-s18266" xml:space="preserve">à meridie, vel media nocte, cui planum horologii æquidiſtat, per
              <lb/>
            rectam G I, ducatur; </s>
            <s xml:id="echoid-s18267" xml:space="preserve">vt conſtat, ſi circulus F G H I, in propria poſitione intelligatur eſſe conſtitu-
              <lb/>
            tus, ita vt centrum illius idem ſit, quod centrum mundi, & </s>
            <s xml:id="echoid-s18268" xml:space="preserve">vertex ſtyli. </s>
            <s xml:id="echoid-s18269" xml:space="preserve">Eodem modo ſi recta a b,
              <lb/>
            transferatur vltra centrum circuli in d e, ita vt d F e, ſit arcus diurnus ♑, & </s>
            <s xml:id="echoid-s18270" xml:space="preserve">rurſus circulus in ho-
              <lb/>
            ras 24 ſecetur, initio facto à puncto d, hoc eſt, à termino occidẽtali, reperiemus in tropico ♑, pun-
              <lb/>
            cta horarum Italicarum. </s>
            <s xml:id="echoid-s18271" xml:space="preserve">Si igitur puncta horarum Italicarum in tropicis inter ſe reſpondentium
              <lb/>
            rectis lineis iungantur, deſcriptum erit horologium Italicum polare. </s>
            <s xml:id="echoid-s18272" xml:space="preserve">Tranſibunt autem horæ Ita-
              <lb/>
              <note position="left" xlink:label="note-0286-05" xlink:href="note-0286-05a" xml:space="preserve">50</note>
            cæ per puncta horarum à meridie, vel media nocte in linea æquinoctiali. </s>
            <s xml:id="echoid-s18273" xml:space="preserve">Vt hora 23. </s>
            <s xml:id="echoid-s18274" xml:space="preserve">Italica per
              <lb/>
            quintam à meridie, 22. </s>
            <s xml:id="echoid-s18275" xml:space="preserve">per 4. </s>
            <s xml:id="echoid-s18276" xml:space="preserve">& </s>
            <s xml:id="echoid-s18277" xml:space="preserve">c. </s>
            <s xml:id="echoid-s18278" xml:space="preserve">vt perſpicuum eſt ex tabula propoſ. </s>
            <s xml:id="echoid-s18279" xml:space="preserve">19. </s>
            <s xml:id="echoid-s18280" xml:space="preserve">ſuperioris lib. </s>
            <s xml:id="echoid-s18281" xml:space="preserve">Vnde ſi ali
              <lb/>
            quæ horæ Italicæ in alterutro tropicorum in altero tropico non habeant puncta reſpondentia, du-
              <lb/>
            cendæ ſunt illæ per horas à meridie, vel media nocte reſpondentes in linea æquinoctiali, vt ex di-
              <lb/>
            cta tabella propoſ. </s>
            <s xml:id="echoid-s18282" xml:space="preserve">19. </s>
            <s xml:id="echoid-s18283" xml:space="preserve">ſuperioris lib. </s>
            <s xml:id="echoid-s18284" xml:space="preserve">colligitur. </s>
            <s xml:id="echoid-s18285" xml:space="preserve">Ita vides horas Italicas 13. </s>
            <s xml:id="echoid-s18286" xml:space="preserve">& </s>
            <s xml:id="echoid-s18287" xml:space="preserve">14. </s>
            <s xml:id="echoid-s18288" xml:space="preserve">ductas eſſe per
              <lb/>
            puncta in tropico ♋, inuenta, & </s>
            <s xml:id="echoid-s18289" xml:space="preserve">per horas 7. </s>
            <s xml:id="echoid-s18290" xml:space="preserve">& </s>
            <s xml:id="echoid-s18291" xml:space="preserve">8. </s>
            <s xml:id="echoid-s18292" xml:space="preserve">à media nocte in linea æquinoctiali, quia in tro
              <lb/>
            pico ♑, non habent puncta reſpondentia illis, quæ in tropico ♋, inuenta ſunt. </s>
            <s xml:id="echoid-s18293" xml:space="preserve">Eodem modo ho-
              <lb/>
            ra 23. </s>
            <s xml:id="echoid-s18294" xml:space="preserve">ducta eſt per punctum in tropico ♑, inuentum, & </s>
            <s xml:id="echoid-s18295" xml:space="preserve">per horam 5. </s>
            <s xml:id="echoid-s18296" xml:space="preserve">à meridie in æquinoctiali
              <lb/>
            linea, & </s>
            <s xml:id="echoid-s18297" xml:space="preserve">ſic de cæteris. </s>
            <s xml:id="echoid-s18298" xml:space="preserve">Linea autem horæ 12. </s>
            <s xml:id="echoid-s18299" xml:space="preserve">ab occaſu ducenda eſt parallela æquinoctiali lineæ
              <lb/>
            per punctum in tropico ♋, inuentum. </s>
            <s xml:id="echoid-s18300" xml:space="preserve">Quoniam enim circuli horæ 12. </s>
            <s xml:id="echoid-s18301" xml:space="preserve">& </s>
            <s xml:id="echoid-s18302" xml:space="preserve">24. </s>
            <s xml:id="echoid-s18303" xml:space="preserve">ab ortu, vel occa-
              <lb/>
            ſu, cum Aequatore eandem communem ſectionem habent, per propoſ. </s>
            <s xml:id="echoid-s18304" xml:space="preserve">16. </s>
            <s xml:id="echoid-s18305" xml:space="preserve">ſuperioris lib. </s>
            <s xml:id="echoid-s18306" xml:space="preserve"/>
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