Blancanus, Josephus, Sphaera mvndi, sev cosmographia demonstratiua , ac facile methodo tradita : in qua totius Mundi fabrica, vna cum nouis, Tychonis, Kepleri, Galilaei, aliorumq' ; Astronomorum adinuentis continentur ; Accessere I. Breuis introductio ad geographiam. II. Apparatus ad mathematicarum studium. III. Echometria, idest Geometrica tractatio de Echo. IV. Nouum instrumentum ad Horologia

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        <div xml:id="echoid-div296" type="section" level="1" n="205">
          <pb o="145" file="0167" n="172" rhead="Liber Decimustertius."/>
        </div>
        <div xml:id="echoid-div299" type="section" level="1" n="206">
          <head xml:id="echoid-head220" style="it" xml:space="preserve">Figura Martis. Cap. III.</head>
          <p>
            <s xml:id="echoid-s13271" xml:space="preserve">QVemadmodum Terra, Luna, Sol, Mercurius, & </s>
            <s xml:id="echoid-s13272" xml:space="preserve">Venus, ſphærica exiſtunt, idem de Marte conue-
              <lb/>
            niens eſt exiſtimare.</s>
            <s xml:id="echoid-s13273" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div300" type="section" level="1" n="207">
          <head xml:id="echoid-head221" style="it" xml:space="preserve">Illuminatio, & Vmbra Martis. Cap. IV.</head>
          <p>
            <s xml:id="echoid-s13274" xml:space="preserve">SVperius oſtenſum eſt Lunam, & </s>
            <s xml:id="echoid-s13275" xml:space="preserve">Venerem, inferius vero oſtendetur Iouem quoque, ex vna parte, à So-
              <lb/>
            le illuminari, ex altera verò vmbram proijcere. </s>
            <s xml:id="echoid-s13276" xml:space="preserve">quare probabile eſt Martem quoque ex vna parte collu-
              <lb/>
            ſtrari, ex altera vero vmbram emittere. </s>
            <s xml:id="echoid-s13277" xml:space="preserve">Porrò lux huius planetæ ignea, ac rubicunda eſt, vnde Græcè Pyrois
              <lb/>
            dicitur, quantitatem autem vmbræ indagamus eo modo quo in præcedentibus planetis. </s>
            <s xml:id="echoid-s13278" xml:space="preserve">nam diameter Solis
              <lb/>
            ad diametrum Marti eſt ſicuti 26. </s>
            <s xml:id="echoid-s13279" xml:space="preserve">ad 2 {1/12}. </s>
            <s xml:id="echoid-s13280" xml:space="preserve">diſtantia vero eius à Sole maxima, colligitur ex prædictis, eſſe ſe-
              <lb/>
            mid. </s>
            <s xml:id="echoid-s13281" xml:space="preserve">terræ 2729. </s>
            <s xml:id="echoid-s13282" xml:space="preserve">quare eadem demonſtratione, & </s>
            <s xml:id="echoid-s13283" xml:space="preserve">figuratione, qua in vmbra terræ vſi ſumus, hunc accom-
              <lb/>
            modata, erit vmbra Martis maximè diſtantis à Sole, longa ſemid. </s>
            <s xml:id="echoid-s13284" xml:space="preserve">terræ 147. </s>
            <s xml:id="echoid-s13285" xml:space="preserve">vnde licebit cognoſcere an poſ-
              <lb/>
            ſit eclypſ are quempiam planetarum, cum planetarum diſtantiæ à Sole, pariter ſint cognitæ. </s>
            <s xml:id="echoid-s13286" xml:space="preserve">quod ad ſenſum
              <lb/>
            in figura magna, & </s>
            <s xml:id="echoid-s13287" xml:space="preserve">vera apparebit. </s>
            <s xml:id="echoid-s13288" xml:space="preserve">Mercurium, & </s>
            <s xml:id="echoid-s13289" xml:space="preserve">Venerem nequit eclypſare quia ipſi ſunt Soli viciniores,
              <lb/>
            quam Mars, vmbra autem Martis proijcitur ad partes Solis auerſas. </s>
            <s xml:id="echoid-s13290" xml:space="preserve">Neque eclipſare Iouem poterit, quia
              <lb/>
            minima diſtantia Iouis à Sole eſt ferè 2046. </s>
            <s xml:id="echoid-s13291" xml:space="preserve">at vero apex vmbrę Martis non protenditur à Sole pluſquã 1775.</s>
            <s xml:id="echoid-s13292" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div301" type="section" level="1" n="208">
          <head xml:id="echoid-head222" style="it" xml:space="preserve">Magnitudo Stellæ Martis. Cap. V.</head>
          <p>
            <s xml:id="echoid-s13293" xml:space="preserve">MEdio cris eius à terra remotio eſt ex Tychone 1745. </s>
            <s xml:id="echoid-s13294" xml:space="preserve">ſemid. </s>
            <s xml:id="echoid-s13295" xml:space="preserve">terræ. </s>
            <s xml:id="echoid-s13296" xml:space="preserve">in qua remotione exhibet apparen-
              <lb/>
            tem diametrum quaſi 2′. </s>
            <s xml:id="echoid-s13297" xml:space="preserve">min. </s>
            <s xml:id="echoid-s13298" xml:space="preserve">Quemadmodum igitur in alijs factum eſt, ſiue practicè per triangulum
              <lb/>
            Iſoſceles, cuius baſis ſubtedat angulum 2′. </s>
            <s xml:id="echoid-s13299" xml:space="preserve">min. </s>
            <s xml:id="echoid-s13300" xml:space="preserve">ſiue alijs modis ſupra adhibitis, inueniemus proportionem
              <lb/>
            eius diametri ad diametrum terræ, eſſe ferè eandem, quæ eſt inter 25. </s>
            <s xml:id="echoid-s13301" xml:space="preserve">& </s>
            <s xml:id="echoid-s13302" xml:space="preserve">60. </s>
            <s xml:id="echoid-s13303" xml:space="preserve">vnde, diameter Martis conti-
              <lb/>
            netur in diametro terræ bis cum duabus Quintis. </s>
            <s xml:id="echoid-s13304" xml:space="preserve">Hinc ſphærarum quoque proportio emerget, eritque vt 1.
              <lb/>
            </s>
            <s xml:id="echoid-s13305" xml:space="preserve">ad 13. </s>
            <s xml:id="echoid-s13306" xml:space="preserve">circiter. </s>
            <s xml:id="echoid-s13307" xml:space="preserve">tredecies igitur Mars à tetra continetur. </s>
            <s xml:id="echoid-s13308" xml:space="preserve">Porrò quoniam Luna quadragies, Mercurus vicies,
              <lb/>
            Venus ſex ies, Mars vero tredicies in terra continetur: </s>
            <s xml:id="echoid-s13309" xml:space="preserve">Terra vero a Sole centies, & </s>
            <s xml:id="echoid-s13310" xml:space="preserve">quadragies: </s>
            <s xml:id="echoid-s13311" xml:space="preserve">erit Mars
              <lb/>
            paulo plus quaum triplus ad Lunam, & </s>
            <s xml:id="echoid-s13312" xml:space="preserve">pluſquam duplus ad Mercurium, & </s>
            <s xml:id="echoid-s13313" xml:space="preserve">paulo minus quam ſubduplus ad
              <lb/>
            Venerem: </s>
            <s xml:id="echoid-s13314" xml:space="preserve">ad Solem tandem vt 1. </s>
            <s xml:id="echoid-s13315" xml:space="preserve">ad 1820.</s>
            <s xml:id="echoid-s13316" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div302" type="section" level="1" n="209">
          <head xml:id="echoid-head223" style="it" xml:space="preserve">Appendix de calculo Martis. Cap. VI.</head>
          <p>
            <s xml:id="echoid-s13317" xml:space="preserve">DVos tantummodo motus Martis ad calculum redigemus: </s>
            <s xml:id="echoid-s13318" xml:space="preserve">quorum primus erit medius eius motus in
              <lb/>
            long itudinem, ſeu motus centri epicycli in longitudinem, ſeu in conſenſequentia ſignorum; </s>
            <s xml:id="echoid-s13319" xml:space="preserve">qui mo-
              <lb/>
            tus nobis numeratur ſeu incipit ab æquinoctio veino: </s>
            <s xml:id="echoid-s13320" xml:space="preserve">pro quo damus ſequentem tabulam, quæ facilè ex ta-
              <lb/>
            bulis iam præmiſſis intelligi poteſt.</s>
            <s xml:id="echoid-s13321" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s13322" xml:space="preserve">Alter motus, quem calculo ſubijciemus, eſt motus anomaliæ, ſiue aſtri ipſius in epicyclo, cuius numeratio
              <lb/>
            iucipit ab apogæo epicycli vt in alijs pro quo nulla indigemus tabula, eam enim ſupplet admirabilis huius
              <lb/>
            motus ad motum Solis connexio, & </s>
            <s xml:id="echoid-s13323" xml:space="preserve">dependentia, quam ſupra explicauimus. </s>
            <s xml:id="echoid-s13324" xml:space="preserve">Ex calculo autem horum duo-
              <lb/>
            rum motuum habebimus ad datum tempus locum Aſtri Martialis in Zodiaco, qui eſt calculi finis.</s>
            <s xml:id="echoid-s13325" xml:space="preserve"/>
          </p>
          <figure number="100">
            <image file="0167-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0167-01"/>
          </figure>
        </div>
      </text>
    </echo>
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