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

Table of figures

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        <div xml:id="echoid-div1958" type="section" level="1" n="502">
          <p>
            <s xml:id="echoid-s39456" xml:space="preserve">
              <pb o="596" file="0612" n="612" rhead="GNOMONICES"/>
            lineam referat, adeò vt, ſi planum ſit firmum, ae
              <unsure/>
            ſtabile, & </s>
            <s xml:id="echoid-s39457" xml:space="preserve">ęquidiſtans circulo horæ 6. </s>
            <s xml:id="echoid-s39458" xml:space="preserve">à mer. </s>
            <s xml:id="echoid-s39459" xml:space="preserve">vel
              <lb/>
            med. </s>
            <s xml:id="echoid-s39460" xml:space="preserve">noc. </s>
            <s xml:id="echoid-s39461" xml:space="preserve">ducenda ſit prius, beneficio libellę, ac perpendiculi, in dato plano recta C S, Horizonti
              <lb/>
            ęquidiſtans, & </s>
            <s xml:id="echoid-s39462" xml:space="preserve">ad hanc excitanda perpendicularis D E, pro linea meridiana, quæ priorem ſecet
              <lb/>
            in A. </s>
            <s xml:id="echoid-s39463" xml:space="preserve">Deinde in recta D E, ſumenda recta A E, propoſito ſtylo ęqualis: </s>
            <s xml:id="echoid-s39464" xml:space="preserve">& </s>
            <s xml:id="echoid-s39465" xml:space="preserve">deſcripto circulo cuiuſ-
              <lb/>
            uis magnitudinis ex E, reliqua perficienda, vt in Meridiano horologio cap. </s>
            <s xml:id="echoid-s39466" xml:space="preserve">11. </s>
            <s xml:id="echoid-s39467" xml:space="preserve">diximus, &</s>
            <s xml:id="echoid-s39468" xml:space="preserve">c.</s>
            <s xml:id="echoid-s39469" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div1960" type="section" level="1" n="503">
          <head xml:id="echoid-head532" style="it" xml:space="preserve">DE ARCVBVS SIGNORVM, ET LON-
            <lb/>
          gitudinum dierum in horologio Polari. CAP. XVII.</head>
          <p>
            <s xml:id="echoid-s39470" xml:space="preserve">ARCVS ſignorum, & </s>
            <s xml:id="echoid-s39471" xml:space="preserve">longitudinum dierum, qui omnes ſunt hyperbolæ, deſcribentur hic,
              <lb/>
              <note position="left" xlink:label="note-0612-01" xlink:href="note-0612-01a" xml:space="preserve">Deſe@i@ti@ ar-
                <lb/>
              cuum ſignorũ,
                <lb/>
              & longitudinũ
                <lb/>
              dierum in Po-
                <lb/>
              @arii horologio.
                <lb/>
              Hotizontalis li
                <lb/>
              mea in horolo-
                <lb/>
              gio Polari, quo
                <lb/>
              m@do deſcriba
                <lb/>
              tur.</note>
            vt in Meridiano horologio, ex figura radiorum Zodiaci cap. </s>
            <s xml:id="echoid-s39472" xml:space="preserve">12. </s>
            <s xml:id="echoid-s39473" xml:space="preserve">dummodo memor ſis, li-
              <lb/>
            neam, quę ibi ſextę horę deputabatur, hic horam 12. </s>
            <s xml:id="echoid-s39474" xml:space="preserve">referre, &</s>
            <s xml:id="echoid-s39475" xml:space="preserve">c. </s>
            <s xml:id="echoid-s39476" xml:space="preserve">vt ibidem monuimus. </s>
            <s xml:id="echoid-s39477" xml:space="preserve">Horizon
              <lb/>
              <note position="left" xlink:label="note-0612-02" xlink:href="note-0612-02a" xml:space="preserve">10</note>
            talis linea ita ducetur. </s>
            <s xml:id="echoid-s39478" xml:space="preserve">Ex B, puncto, vbi hora 9. </s>
            <s xml:id="echoid-s39479" xml:space="preserve">vel 3. </s>
            <s xml:id="echoid-s39480" xml:space="preserve">æquinoctialem lineam interſecat, arcus cir
              <lb/>
            culi verſus meridianam lineam deſcribatur, ſurſum verſus, (voco partem ſuperiorem illam,
              <lb/>
            quæ ſupra lineam æquinoctialem eſt, poſito horologio in proprio ſitu, ita vt horę à med.
              <lb/>
            </s>
            <s xml:id="echoid-s39481" xml:space="preserve">noc. </s>
            <s xml:id="echoid-s39482" xml:space="preserve">ſint nobis ad ſiniſtram, & </s>
            <s xml:id="echoid-s39483" xml:space="preserve">pomeridianę ad dexteram) in quo ſumpto arcu, qui comple-
              <lb/>
            mento altitudinis poli ęqualis ſit, ducatur ex fine ipſius ad 9. </s>
            <s xml:id="echoid-s39484" xml:space="preserve">horam, vel 3. </s>
            <s xml:id="echoid-s39485" xml:space="preserve">in linea equino-
              <lb/>
            ctiali linea recta, quę lineam horę 12. </s>
            <s xml:id="echoid-s39486" xml:space="preserve">ſecabit in puncto D, per quod recta æquinoctiali lineę pa-
              <lb/>
            rallela acta erit Horizontalis diſtribuens totum horologium in duo, quorum maius, in quo
              <lb/>
              <note position="left" xlink:label="note-0612-03" xlink:href="note-0612-03a" xml:space="preserve">Horoiogiũ Po-
                <lb/>
              late Superius, &
                <lb/>
              inferius. Item
                <lb/>
              Diurnum, & no
                <lb/>
              @ursum quod.</note>
            linea æquinoctialis comprehenditur, ſuperius, vel diurnum, alterum verò inferius noctur-
              <lb/>
            num ve appellatur. </s>
            <s xml:id="echoid-s39487" xml:space="preserve">In inferiori tamen mutantur numeri horarum in earum complementa vſque
              <lb/>
            ad 12. </s>
            <s xml:id="echoid-s39488" xml:space="preserve">linea meridiana ſignificante horam 12. </s>
            <s xml:id="echoid-s39489" xml:space="preserve">medię noctis, & </s>
            <s xml:id="echoid-s39490" xml:space="preserve">arcus ſignorum auſtralium fiunt
              <lb/>
              <note position="left" xlink:label="note-0612-04" xlink:href="note-0612-04a" xml:space="preserve">20</note>
            arcus borealium ſignorum, &</s>
            <s xml:id="echoid-s39491" xml:space="preserve">c. </s>
            <s xml:id="echoid-s39492" xml:space="preserve">Sed ſi idem horologium pro nocturno accipiatur, mutatio hæc
              <lb/>
            facienda non eſt. </s>
            <s xml:id="echoid-s39493" xml:space="preserve">Sunt autem arcus ſignorum auſtralium illi, qui exiſtunt ſupra lineam æqui-
              <lb/>
            noctialem, verſus horizontalem lineam procedendo: </s>
            <s xml:id="echoid-s39494" xml:space="preserve">borealium verò illi, qui infra ęquino-
              <lb/>
            ctialem lineam ſunt deſcripti. </s>
            <s xml:id="echoid-s39495" xml:space="preserve">Exemplum poſitum eſt in pręcedenti capite.</s>
            <s xml:id="echoid-s39496" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div1962" type="section" level="1" n="504">
          <head xml:id="echoid-head533" style="it" xml:space="preserve">DE HOROLOGIO POLARI ITALICO,
            <lb/>
          & Babylonico. CAP. XVIII.</head>
          <figure number="384">
            <image file="0612-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0612-01"/>
          </figure>
          <note position="left" xml:space="preserve">30</note>
          <note position="left" xml:space="preserve">40</note>
          <note position="left" xml:space="preserve">50</note>
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