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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        <div xml:id="echoid-div1725" type="section" level="1" n="465">
          <head xml:id="echoid-head492" xml:space="preserve">GNOMONICES</head>
          <head xml:id="echoid-head493" xml:space="preserve">LIBER SEXTVS.</head>
          <figure number="331">
            <image file="0544-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0544-01"/>
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        </div>
        <div xml:id="echoid-div1726" type="section" level="1" n="466">
          <head xml:id="echoid-head494" style="it" xml:space="preserve">AVCTORE</head>
          <note position="left" xml:space="preserve">10</note>
        </div>
        <div xml:id="echoid-div1727" type="section" level="1" n="467">
          <head xml:id="echoid-head495" xml:space="preserve">CHRISTOPHORO CLAVIO BAMBER GENSI</head>
          <head xml:id="echoid-head496" xml:space="preserve">SOCIETATIS IESV.</head>
          <p>
            <s xml:id="echoid-s34019" xml:space="preserve">
              <emph style="sc">EDidit</emph>
            Ptolemæus libellum acutiſſimum de Analemmate,
              <lb/>
            in quo & </s>
            <s xml:id="echoid-s34020" xml:space="preserve">Geometrice, & </s>
            <s xml:id="echoid-s34021" xml:space="preserve">per numeros arcus quoſdam circulo-
              <lb/>
            rum inueſtigat, per quos eadem ferme via, qua nos in proxi-
              <lb/>
            mo libro vſi ſumus, horologia omnis generis deſcribantur.
              <lb/>
            </s>
            <s xml:id="echoid-s34022" xml:space="preserve">Id quod feliciter executus eſt Federicus Commandinus in li-
              <lb/>
              <note position="left" xlink:label="note-0544-02" xlink:href="note-0544-02a" xml:space="preserve">20</note>
            bello de horologiorum deſcriptione, quem ad illud opus de
              <lb/>
            Analemmate adiunxit. </s>
            <s xml:id="echoid-s34023" xml:space="preserve">Quoniam vero quàm plurimi & </s>
            <s xml:id="echoid-s34024" xml:space="preserve">Ana
              <lb/>
            lemma Ptolemæi, & </s>
            <s xml:id="echoid-s34025" xml:space="preserve">deſcriptionem horologiorum à Federico
              <lb/>
            Commandino ex eo depromptam ſuſpiciunt quidem, & </s>
            <s xml:id="echoid-s34026" xml:space="preserve">ad-
              <lb/>
            mirantur propter acumen ingenii, & </s>
            <s xml:id="echoid-s34027" xml:space="preserve">ſubtilitatem demonſtrationum, ſed ſimul
              <lb/>
            vtrumque auctorem grauiſſime accuſant de affectata quadam obſcuritate, vt om-
              <lb/>
            nino diffidant, ſeſe fructum aliquem ex eorum ſeriptis capere poſſe: </s>
            <s xml:id="echoid-s34028" xml:space="preserve">faciendum
              <lb/>
            mihi omnino putaui, vt rationem illam deſcribendorum horologiorum, quam
              <lb/>
            Federicus Commandinus, vt diximus, ex Analemmate Ptolemæi deprompſit, & </s>
            <s xml:id="echoid-s34029" xml:space="preserve">
              <lb/>
            quæ iucundiſſima eſt, ſubtiliſſimaq́;</s>
            <s xml:id="echoid-s34030" xml:space="preserve">, clarius, &</s>
            <s xml:id="echoid-s34031" xml:space="preserve">, quoad eius ſieri poterit, breuius hoc
              <lb/>
              <note position="left" xlink:label="note-0544-03" xlink:href="note-0544-03a" xml:space="preserve">30</note>
            libro explicem, vt à quouis, qui omnino rerum Geometricarum ignarus non ſit, in-
              <lb/>
            telligi poſſit, ac percipi. </s>
            <s xml:id="echoid-s34032" xml:space="preserve">Non ſequar autem verba Ptolemæi, ſed ſententiam, atque
              <lb/>
            rem ipſam, præſertim in arcubus, circumferentijsve inquirendis per numeros, vbi
              <lb/>
            multo breuiores ſupputationes, quam Ptolemæus, excogitauimus, vt facile quiuis
              <lb/>
            iudicabit, ſi hæc noſtra cum Ptolemæi ſcriptis contulerit.</s>
            <s xml:id="echoid-s34033" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div1729" type="section" level="1" n="468">
          <head xml:id="echoid-head497" style="it" xml:space="preserve">EXPLICATIO CIRCVLORVM, ET
            <lb/>
          circumferentiarum, quos præcipue in Analemmate
            <lb/>
          Ptolemæus conſiderat. CAPVTI.</head>
          <note position="left" xml:space="preserve">40</note>
          <p>
            <s xml:id="echoid-s34034" xml:space="preserve">
              <emph style="sc">PTolemaevs</emph>
            trium potiſſimum horologiorum, nempe Horizontalis, Verti-
              <lb/>
            calis, ac Meridiani, rationem habuiſſe videtur; </s>
            <s xml:id="echoid-s34035" xml:space="preserve">(Nos tamen eadem ratione, ad mo
              <lb/>
              <note position="left" xlink:label="note-0544-05" xlink:href="note-0544-05a" xml:space="preserve">Quos cireulos
                <lb/>
              præcipue in A-
                <lb/>
              nalemmate Pto
                <lb/>
              lemæus conſi-
                <lb/>
              de@et.</note>
            dum horizontalis horologii, omnia alia horologia, de quibus in ſuperioribus egi
              <lb/>
            mus, deſcribemus) propterea tres tantum circulos maximos præcipue in Analem-
              <lb/>
            mate conſiderat ſeſe in qualibet ſphæræ poſitione mutuo ad angulos rectos in-
              <lb/>
            terſecantes, puta Horizontem, Meridianum, & </s>
            <s xml:id="echoid-s34036" xml:space="preserve">Verticalem circulum proprie di-
              <lb/>
            ctum, quibus dicta tria horologia æquidiſtant, vt ex ſuperioribus patet. </s>
            <s xml:id="echoid-s34037" xml:space="preserve">Quilibet enim horum
              <lb/>
            trium circulorum rectus eſt, per propoſ. </s>
            <s xml:id="echoid-s34038" xml:space="preserve">15. </s>
            <s xml:id="echoid-s34039" xml:space="preserve">lib. </s>
            <s xml:id="echoid-s34040" xml:space="preserve">1. </s>
            <s xml:id="echoid-s34041" xml:space="preserve">Theod. </s>
            <s xml:id="echoid-s34042" xml:space="preserve">ad reliquos duos, cum per eorum po
              <lb/>
            los ducatur, vt perſpicuum eſt. </s>
            <s xml:id="echoid-s34043" xml:space="preserve">Communes quoque eorundem circulorum ſectiones mutuo in-
              <lb/>
            ter ſe angulos rectos conſtituunt in centro mundi; </s>
            <s xml:id="echoid-s34044" xml:space="preserve">propterea quod quiliber duo horum circulo-
              <lb/>
              <note position="left" xlink:label="note-0544-06" xlink:href="note-0544-06a" xml:space="preserve">19. vndec.</note>
              <note position="left" xlink:label="note-0544-07" xlink:href="note-0544-07a" xml:space="preserve">50</note>
            rum ad reliquum recti ſunt, vt diximus, ac propterea & </s>
            <s xml:id="echoid-s34045" xml:space="preserve">communis illorum ſectio ad eundem per-
              <lb/>
            pendicularis, &</s>
            <s xml:id="echoid-s34046" xml:space="preserve">c. </s>
            <s xml:id="echoid-s34047" xml:space="preserve">Cõmunis autem ſectio Horizontis, & </s>
            <s xml:id="echoid-s34048" xml:space="preserve">Meridiani appellatur à Ptolemęo linea
              <lb/>
            meridiana@ Sectio vero communis Horizontis, & </s>
            <s xml:id="echoid-s34049" xml:space="preserve">Verticalis dicitur linea æquinoctialis, eo quod
              <lb/>
              <note position="left" xlink:label="note-0544-08" xlink:href="note-0544-08a" xml:space="preserve">Linea meridia-
                <lb/>
              na, linea æqui-
                <lb/>
              noctialis, & Gno
                <lb/>
              mon quid ſecũ-
                <lb/>
              du@ Ptolemęũ.</note>
            ſit communis etiam ſectio Horizontis, & </s>
            <s xml:id="echoid-s34050" xml:space="preserve">æquinoctialis circuli: </s>
            <s xml:id="echoid-s34051" xml:space="preserve">Communis denique ſectio Me-
              <lb/>
            ridiani, & </s>
            <s xml:id="echoid-s34052" xml:space="preserve">Verticalis Gnomon vocatur. </s>
            <s xml:id="echoid-s34053" xml:space="preserve">Quæ omnia in ſubiecta figura apparent, in qua circulus
              <lb/>
            A B C D, eſt Meridianus; </s>
            <s xml:id="echoid-s34054" xml:space="preserve">A F C G, Horizon ad Meridianum rectus, B F D G, Verticalis proprie
              <lb/>
            dictus ad vtrumque nominatum circulum rectus; </s>
            <s xml:id="echoid-s34055" xml:space="preserve">Linea meridiana recta A C, nempe communis
              <lb/>
            ſectio Horizontis, ac Meridian@; </s>
            <s xml:id="echoid-s34056" xml:space="preserve">Linea æquinoctialis recta F G, communis ſcilicet ſectio Horizõ-
              <lb/>
            tis, & </s>
            <s xml:id="echoid-s34057" xml:space="preserve">Verticalis; </s>
            <s xml:id="echoid-s34058" xml:space="preserve">Linea denique recta D B, gnomon, nimirum ſectio communis Meridiani, & </s>
            <s xml:id="echoid-s34059" xml:space="preserve">
              <lb/>
            Verticalis.</s>
            <s xml:id="echoid-s34060" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s34061" xml:space="preserve">CVILIBET deinde horum trium circulorum motum quendam tribuit Ptolemæus.</s>
            <s xml:id="echoid-s34062" xml:space="preserve"/>
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