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-div79" type="section" level="1" n="53">
          <pb file="0057a" n="60"/>
          <figure number="34">
            <image file="0057a-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0057a-01"/>
          </figure>
        </div>
        <div xml:id="echoid-div80" type="section" level="1" n="54">
          <head xml:id="echoid-head57" xml:space="preserve">EXPLANATIO, ETCONSTRVCTIO FIGVRAE PONENDAE INTER</head>
          <p style="it">
            <s xml:id="echoid-s3748" xml:space="preserve">COn ſtat præſens figura paralellis quatuor lineis rectis, & </s>
            <s xml:id="echoid-s3749" xml:space="preserve">pluſquam dimidia: </s>
            <s xml:id="echoid-s3750" xml:space="preserve">quæ omnes tamen (ſaltem per imaginationem) constituendæ ſunt in directum
              <lb/>
            ad vnam tantum rectam lineam efficiendam; </s>
            <s xml:id="echoid-s3751" xml:space="preserve">ſicuti ego prius eam in longa papyri Zona deſcripſeram; </s>
            <s xml:id="echoid-s3752" xml:space="preserve">ſed quod præ longitudine Bibliopolis eßeti commo-
              <lb/>
            do, eam in haſce quinque partes diuiſam ad banc breuitatem contraxi; </s>
            <s xml:id="echoid-s3753" xml:space="preserve">quas tamen quilibet poterit ab inuicem prius diſſectas vnam post alteram ſecundum nu-
              <lb/>
            merorum ſeriem iterum in longum connectere, atque in pristinum ſtatum reſtituere: </s>
            <s xml:id="echoid-s3754" xml:space="preserve">quod quidem Lectori conſulo, vt maiorem ex ea fructum, ac volupta-
              <lb/>
            tem percipiat. </s>
            <s xml:id="echoid-s3755" xml:space="preserve">porrò tota hæc linea refert diſtantiam à centro Terræ, vſque ad ſummum apogæum cæli Solis; </s>
            <s xml:id="echoid-s3756" xml:space="preserve">ſeu eſt ſemidiameter conuexi eius. </s>
            <s xml:id="echoid-s3757" xml:space="preserve">quæ conſtat,
              <lb/>
            vt postea patebit, ſemidiametris Terræ 1182. </s>
            <s xml:id="echoid-s3758" xml:space="preserve">atque in ea poſita ſunt ſuis locis corpora Planetarum, necnon vmbra Terræ, & </s>
            <s xml:id="echoid-s3759" xml:space="preserve">Lunæ, omnia cum veris, ac
              <lb/>
            mutuis eorum proportionibus. </s>
            <s xml:id="echoid-s3760" xml:space="preserve">Eam autem ſic conſtruxi, primo deſcripſi globulum Terræ, quem initio totius lineæ vices notatum litera T. </s>
            <s xml:id="echoid-s3761" xml:space="preserve">quoniam vero ſe-
              <lb/>
            midiametro Terræ vtuntur Aſtronomis pro cæterarum magnitudinum, ac diſtantiarum menſura; </s>
            <s xml:id="echoid-s3762" xml:space="preserve">ideo in prima linea ſinistrorſum numeraui 52. </s>
            <s xml:id="echoid-s3763" xml:space="preserve">huius Terræ
              <lb/>
            ſemidiametros, quæ eſt finitimæ Lunæ diſtantia, ſeueft Lunæ perigæum, ibique Lunæ ſphærulam, ad Terram comparatam depinxi: </s>
            <s xml:id="echoid-s3764" xml:space="preserve">inde
              <unsure/>
            ad 68. </s>
            <s xml:id="echoid-s3765" xml:space="preserve">ſemid. </s>
            <s xml:id="echoid-s3766" xml:space="preserve">quæ
              <lb/>
            eſt ſupremæ Lunæ à T. </s>
            <s xml:id="echoid-s3767" xml:space="preserve">remotio, ſeu apogæum, iterum poſui lunulam. </s>
            <s xml:id="echoid-s3768" xml:space="preserve">hinc vſque ad 254. </s>
            <s xml:id="echoid-s3769" xml:space="preserve">ſemid. </s>
            <s xml:id="echoid-s3770" xml:space="preserve">poſui terminum lineæ, ac ſimul vmbræ terrestris, quam vi-
              <lb/>
            des à terra illuc vſque in acutum deſinere. </s>
            <s xml:id="echoid-s3771" xml:space="preserve">postea ad ſecundam lineam, ex eadem parte, facto gradu, ac dextrorſum procedendo ad ſemid. </s>
            <s xml:id="echoid-s3772" xml:space="preserve">285. </s>
            <s xml:id="echoid-s3773" xml:space="preserve">occurrit
              <lb/>
            Veneris perigæum. </s>
            <s xml:id="echoid-s3774" xml:space="preserve">inde pariter dextrorſum ad tertiam lineam flectendo, atque per eam ſiniſtrorſum redeunti, ad ſemid. </s>
            <s xml:id="echoid-s3775" xml:space="preserve">571. </s>
            <s xml:id="echoid-s3776" xml:space="preserve">perigæum Mercurij, & </s>
            <s xml:id="echoid-s3777" xml:space="preserve">po-
              <lb/>
            stea ad 761. </s>
            <s xml:id="echoid-s3778" xml:space="preserve">Mars perigæus fiunt obuiam. </s>
            <s xml:id="echoid-s3779" xml:space="preserve">hinc per quartam lineam, nulla re inſignitam tranſcendimus ad quintam, in qua ad 1102. </s>
            <s xml:id="echoid-s3780" xml:space="preserve">ſemid in Solem peri-
              <lb/>
            gæum incidimus. </s>
            <s xml:id="echoid-s3781" xml:space="preserve">deinde ad 1142. </s>
            <s xml:id="echoid-s3782" xml:space="preserve">ad Solem ipſum in mediocri diſtantia ſitum peruenimus. </s>
            <s xml:id="echoid-s3783" xml:space="preserve">cuius ſphæra ibi depicta habet ſemidiametrum constantem ex ſe-
              <lb/>
            midiam. </s>
            <s xml:id="echoid-s3784" xml:space="preserve">T 5 {1/2}. </s>
            <s xml:id="echoid-s3785" xml:space="preserve">vt habeat veram cum Terrę proportionem. </s>
            <s xml:id="echoid-s3786" xml:space="preserve">ſicuti etiam globuli Lunæ, Ven. </s>
            <s xml:id="echoid-s3787" xml:space="preserve">Merc. </s>
            <s xml:id="echoid-s3788" xml:space="preserve">& </s>
            <s xml:id="echoid-s3789" xml:space="preserve">Mart. </s>
            <s xml:id="echoid-s3790" xml:space="preserve">habent ſemidiam. </s>
            <s xml:id="echoid-s3791" xml:space="preserve">ad ſemidiam. </s>
            <s xml:id="echoid-s3792" xml:space="preserve">T. </s>
            <s xml:id="echoid-s3793" xml:space="preserve">relatas; </s>
            <s xml:id="echoid-s3794" xml:space="preserve">qua-
              <lb/>
            les exponuntur in Tabella ſecunda ad finem Firmamenti.</s>
            <s xml:id="echoid-s3795" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s3796" xml:space="preserve">Quando igitur hæc figura erat vnica linea in longa papyri faſcia extenſa, duxi duas lineas Solem, ac Teuram hinc inde tangentes, quæ ibi concurrerunt
              <lb/>
            vbi nunc est vmbra T. </s>
            <s xml:id="echoid-s3797" xml:space="preserve">apex, ideſt ad num. </s>
            <s xml:id="echoid-s3798" xml:space="preserve">254. </s>
            <s xml:id="echoid-s3799" xml:space="preserve">ſicque eius longitudinem denotarunt: </s>
            <s xml:id="echoid-s3800" xml:space="preserve">vt patet ex ſuperiori tractatu de lumine, & </s>
            <s xml:id="echoid-s3801" xml:space="preserve">vmbra. </s>
            <s xml:id="echoid-s3802" xml:space="preserve">eodem modo re-</s>
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