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-s24604" xml:space="preserve">POSTREMO in linea ſtyli χ d, ſumpta recta G L, ſiue ſupra G, ſiue infra, rectæ G I, æqua-
              <lb/>
            li, deſcribatur ex L, circulus ciusuis magnitudinis, qui in partes 24. </s>
            <s xml:id="echoid-s24605" xml:space="preserve">æquales ſecetur, initio facto
              <lb/>
            à recta L M, quæ per L, centrum circuli, & </s>
            <s xml:id="echoid-s24606" xml:space="preserve">punctum M, ducitur, vbi linea æquinoctialis lineam
              <lb/>
              <figure xlink:label="fig-0390-01" xlink:href="fig-0390-01a" number="261">
                <image file="0390-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0390-01"/>
              </figure>
              <note position="left" xlink:label="note-0390-01" xlink:href="note-0390-01a" xml:space="preserve">10</note>
              <note position="left" xlink:label="note-0390-02" xlink:href="note-0390-02a" xml:space="preserve">20</note>
              <note position="left" xlink:label="note-0390-03" xlink:href="note-0390-03a" xml:space="preserve">30</note>
            meridianam E ε, interſecat, veluti in horologio declinante à Verticali fit. </s>
            <s xml:id="echoid-s24607" xml:space="preserve">Quod ſi contingat li
              <lb/>
            neam ęquinoctialem eſſe parallelam lineæ meridianę, vt accidit in plano horologij, quod circu-
              <lb/>
            lo maximo æquidiſtat, qui Meridianum circulum in eodẽ puncto ſecat, in quo ab Aequatore di-
              <lb/>
            uiditur, vt paulo infra demoſtrabimus, inchoanda erit diuiſio dicti circuli ex L, deſcripti à recta,
              <lb/>
            quæ per L, centrum circuli parallela ducitur lineæ æquinoctiali, vel meridianæ, vt in ſexta figura
              <lb/>
            huius propoſ. </s>
            <s xml:id="echoid-s24608" xml:space="preserve">apparet in linea M O. </s>
            <s xml:id="echoid-s24609" xml:space="preserve">Hic autem, quoniam plerunque accidit, vt centrum L, & </s>
            <s xml:id="echoid-s24610" xml:space="preserve">
              <lb/>
            punctum M, tam vicina inter ſe ſint, vt vix ſine errore aliquo recta L M, à qua diuiſio circuli de-
              <lb/>
              <note position="left" xlink:label="note-0390-04" xlink:href="note-0390-04a" xml:space="preserve">40</note>
            bet incipere, duci poſſit, adhibendum omnino erit remedium illud, quod in propoſ. </s>
            <s xml:id="echoid-s24611" xml:space="preserve">1. </s>
            <s xml:id="echoid-s24612" xml:space="preserve">huius libri
              <lb/>
            de horologio declinante à Verticali tradidimus, vt nimirum prius lineam horæ 6. </s>
            <s xml:id="echoid-s24613" xml:space="preserve">vel alterius cu-
              <lb/>
            iuſpiam horæ ducamus, & </s>
            <s xml:id="echoid-s24614" xml:space="preserve">c. </s>
            <s xml:id="echoid-s24615" xml:space="preserve">vt paulo infra docebimus poſt demonſtrationem. </s>
            <s xml:id="echoid-s24616" xml:space="preserve">Rectæ enim per
              <lb/>
            centrum L, & </s>
            <s xml:id="echoid-s24617" xml:space="preserve">puncta diuiſionum emiſſæ ſecabunt æquinoctialem lineam in punctis, per quæ re-
              <lb/>
            ctæ emiſſæ per ρ, centrum horologij, vel vbi centrum non eſt, vt in tertia figura, rectæ ipſi lineæ
              <lb/>
            meridianæ parallelæ, vel ad lineam æquinoctialem perpendiculares, dabunt horas à meridie, vel
              <lb/>
              <note position="left" xlink:label="note-0390-05" xlink:href="note-0390-05a" xml:space="preserve">Lineæ horariæ.</note>
            media nocte, hoc ordine. </s>
            <s xml:id="echoid-s24618" xml:space="preserve">In planis, quæ ad auſtrum ſpectant, portio lineæ meridianæ à centro ho
              <lb/>
              <note position="left" xlink:label="note-0390-06" xlink:href="note-0390-06a" xml:space="preserve">Ordo horarũ.</note>
            rologij ρ, verſus lineam æquinoctialem extenſa, vt in prioribus duabus figuris, vel tota linea me-
              <lb/>
            ridiana, vbi centrum deeſt, vt in tertia figura, demonſtrat horam 12. </s>
            <s xml:id="echoid-s24619" xml:space="preserve">meridiei, quæ verò ei ſunt ad
              <lb/>
            dexteram in linea æquinoctiali, horas pomeridianas, & </s>
            <s xml:id="echoid-s24620" xml:space="preserve">quæ ad ſiniſtram, antemeridianas ſigni-
              <lb/>
              <note position="left" xlink:label="note-0390-07" xlink:href="note-0390-07a" xml:space="preserve">50</note>
            ficant: </s>
            <s xml:id="echoid-s24621" xml:space="preserve">reliqua verò portio lineæ meridianæ à centro quoque incipiens oſtendit horam 12. </s>
            <s xml:id="echoid-s24622" xml:space="preserve">medię
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            noctis. </s>
            <s xml:id="echoid-s24623" xml:space="preserve">In planis autem boream reſpicientibus, exiſtente quidem linea æquinoctiali infra centrũ
              <lb/>
            horologii ρ, in linea indicis, vt in quarta figura conſpicitur, denotabit portio meridianæ lineæ à
              <lb/>
            centro ρ, verſus lineam æquinoctialem porrecta horam 12. </s>
            <s xml:id="echoid-s24624" xml:space="preserve">meridiei, quæ verò ei ſunt ad dexterã
              <lb/>
            in linea æquinoctiali, antemeridianas horas, & </s>
            <s xml:id="echoid-s24625" xml:space="preserve">quæ ad ſiniſtram, pomeridianas indicant; </s>
            <s xml:id="echoid-s24626" xml:space="preserve">reliqua
              <lb/>
            autem portio meridianæ lineæ vltra centrum verſus ſuperiores partes tendens, ad horam 12. </s>
            <s xml:id="echoid-s24627" xml:space="preserve">me-
              <lb/>
            diæ noctis pertinet. </s>
            <s xml:id="echoid-s24628" xml:space="preserve">Exiſtente verò æquinoctiali linea ſupra horologii centrum ρ, in linea indicis,
              <lb/>
            ſeu ſtyli, vt in poſterioribus duabus figuris huius deſcriptionis cernitur, portio lineæ meridianæ
              <lb/>
            à centro horologij ρ, verſus lineam æquinoctialem producta, vel certè ad ſuperiores partes ten-
              <lb/>
            dens, vbi parallelæ ſunt linea æquinoctialis, & </s>
            <s xml:id="echoid-s24629" xml:space="preserve">meridiana, vt in ſexta figura, monſtrabit horam
              <lb/>
            12. </s>
            <s xml:id="echoid-s24630" xml:space="preserve">mediæ noctis, horæ verò ad dextram lineæ meridianæ in æquinoctiali linea deſcendẽtes </s>
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