Benedetti, Giovanni Battista de, Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]

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          <div xml:id="echoid-div477" type="chapter" level="2" n="6">
            <div xml:id="echoid-div509" type="section" level="3" n="6">
              <div xml:id="echoid-div509" type="letter" level="4" n="1">
                <p>
                  <s xml:id="echoid-s3217" xml:space="preserve">
                    <pb o="256" rhead="IO. BABPT. BENED." n="268" file="0268" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/163127KK/pageimg/0268"/>
                  axem (vt dicunt) tolluntur, quod ſufficit ad recipiendum lumen, & influentias illo-
                    <lb/>
                  rum corporum. </s>
                  <s xml:id="echoid-s3218" xml:space="preserve">Et ita, veluti princeps corporum vniuerſi, intra vnum an-
                    <lb/>
                  num circa eam vertitur. </s>
                  <s xml:id="echoid-s3219" xml:space="preserve">Ita etiam ſuſſiceret, vt ipſa terra circa dictum diuinum
                    <lb/>
                  corpus ſolare, interſecando axem diurnum cum axe annuali (cum ab eo lumen, ca-
                    <lb/>
                  lorem, & influentiam ſuſcipere debeat)
                    <reg norm="circunuolueretur" type="simple">circunuolueret̃</reg>
                  . </s>
                  <s xml:id="echoid-s3220" xml:space="preserve">Rationes autem a Ptolo-
                    <lb/>
                  meo in contrarium adductæ apud ipſos, nullę ſunt, quia quęlibet pars (vt inquiunt)
                    <lb/>
                  retinet naturam totius, præterquam
                    <reg norm="quod" type="simple">ꝙ</reg>
                  aer, & aqua, quæ ipſam terram
                    <reg norm="circundant" type="context">circundãt</reg>
                  , pla
                    <lb/>
                  nè eundem naturalem impetum motus obtineant, quitanto lentior eſt, quanto lon
                    <lb/>
                  gius diſtat aer ab ipſa terra, ſecundum etiam talem opinionem, nulla neceſſitas fo-
                    <lb/>
                  ret, vt locus fixarum terminaretur aliquibus ſuperficiebus, conuexa ſcilicet, & de-
                    <lb/>
                  uexa.</s>
                </p>
              </div>
              <div xml:id="echoid-div510" type="letter" level="4" n="2">
                <head xml:id="echoid-head384" style="it" xml:space="preserve">De Luce, Lumine, & Colore, De obiectuoculi, De lumine
                  <lb/>
                Luna, & Rubedine nubium.</head>
                <head xml:id="echoid-head385" xml:space="preserve">AD EVNDEM.</head>
                <p>
                  <s xml:id="echoid-s3221" xml:space="preserve">QVod proximè quærebas, an ſit lux aliqua, quæ à corpore lucido non proue-
                    <lb/>
                  niat, mihi facilè ad conſiderandum videtur. </s>
                  <s xml:id="echoid-s3222" xml:space="preserve">hic enim oportet, vt nos ad id
                    <lb/>
                  quod perpetuò videmus referamus, exiſtimo autem te velle dicere lumen, non lu-
                    <lb/>
                  cem, quia propriè lux, qualitas ea viſibilis appellatur, quæ eſt in corpore lucido, à
                    <lb/>
                  quo quidem corpore lumen effunditur; </s>
                  <s xml:id="echoid-s3223" xml:space="preserve">lumen verò, ea qualitas eſſe dicitur, quæ ex
                    <lb/>
                  tra ipſum corpus reperitur, à luce, quæ in dicto corpore manet emanans. </s>
                  <s xml:id="echoid-s3224" xml:space="preserve">vnde pa-
                    <lb/>
                  tet, nullam lucem abſque corpore ſubiecto eſſe poſſe, id quod cum fieri quîret,
                    <reg norm="idem" type="context">idẽ</reg>
                    <lb/>
                  de quolibet alio accidente dici poſſet, id eſt quod ex ſe, & abſque aliquo ſubiecto
                    <lb/>
                  ſubſiſteret.</s>
                </p>
                <p>
                  <s xml:id="echoid-s3225" xml:space="preserve">Lumen deinde à luce proficiſci patet,
                    <reg norm="quod" type="simple">ꝙ</reg>
                  penetrat diaphanum, neque aliquo mo-
                    <lb/>
                  do ſuum actum oſtendit, niſi, aut per incidentiam, aut ratione opaci, ex reflexione,
                    <lb/>
                  cuius ſuperficiei colorem induit. </s>
                  <s xml:id="echoid-s3226" xml:space="preserve">Atque hæc eſt cauſa, vt inter crepuſculum matu-
                    <lb/>
                  tinum, aut veſpertinum, nox etiam ſi ſit ſerena, adeo obſcura nobis appareat, quam-
                    <lb/>
                  uis totum vniuerſum diaphanum, extra conum vmbræ, quæ ex terra prouenit ſit vn
                    <lb/>
                    <reg norm="dique" type="simple">diq;</reg>
                  radijs luminoſis Solis colluſtratum; </s>
                  <s xml:id="echoid-s3227" xml:space="preserve">qui quidem radij, non niſi à ſuamet reflexio
                    <lb/>
                  ne à Luna, & ab alijs ſtellis (vt corporibus opacis, quæ reſiſtunt lumini, ne vlterius
                    <lb/>
                  penetrare poſſit, vnde retrò redit) comprehenduntur.</s>
                </p>
                <p>
                  <s xml:id="echoid-s3228" xml:space="preserve">Ais etiam propria viſus obiecta plura eſſe, nominans pro vno, colorem, & lucem
                    <lb/>
                  pro alio. </s>
                  <s xml:id="echoid-s3229" xml:space="preserve">Ego autem reſpondeo, obiectum oculi eſſe vnicum tantum, ideſt lumen.
                    <lb/>
                  </s>
                  <s xml:id="echoid-s3230" xml:space="preserve">Quod ad lucem ſpectat, iam tibi dixi, eam eſſe quandam qualitatem in corpore luci
                    <lb/>
                  do, & non extra ipſum poſitam, à quo quidem corpore, cum non exeat, oculi obie-
                    <lb/>
                  ctum eſſe nequit, ſed lumen quidem ab ipſa luce productum. </s>
                  <s xml:id="echoid-s3231" xml:space="preserve">Color etiam, qui eſt in
                    <lb/>
                  corpore colorato, obiectum oculi eſſe non poteſt, cum dictum corpus non deſerat,
                    <lb/>
                  ſed lumen quidem ab eodem corpore reflexum, & huiuſmodi corporis colore tin-
                    <lb/>
                  ctum: </s>
                  <s xml:id="echoid-s3232" xml:space="preserve">vnde tam lumen incidens, quam reflexum colore eſt ſemper imbutum.</s>
                </p>
                <p>
                  <s xml:id="echoid-s3233" xml:space="preserve">Illud quidem coloratum eſt qualitate lucis corporis lucidi, a ut medij, per quod
                    <lb/>
                  tranſit, ſed hoc colore corporis, à quo reflectitur.</s>
                </p>
                <p>
                  <s xml:id="echoid-s3234" xml:space="preserve">Neque etiam te ignorare volo, lumina reflexa colorata, non reflecti à puris pro-
                    <lb/>
                    <reg norm="priisque" type="simple">priisq́;</reg>
                  ſuperficiebus corporum coloratorum, eo
                    <reg norm="quod" type="wordlist">qđ</reg>
                  pauca corpora tam opaca repe-
                    <lb/>
                  riuntur, ut immediatè lumen à ſuperficie propriè
                    <reg norm="reflectant" type="context">reflectãt</reg>
                  , ſed lumen penetrat alim </s>
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