Biancani, Giuseppe, Aristotelis loca mathematica, 1615

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    <archimedes>
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              <s id="s.001670">
                <pb pagenum="92" xlink:href="009/01/092.jpg"/>
              ueraſſe, ſed ſuperiori etiam ætate id ipſum Hieron. </s>
              <s id="s.001671">Cardan. libro de ſubtili­
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              tate conatus eſt,
                <expan abbr="neq;">neque</expan>
              irrito conatu, demonſtrare; qui præterea idem cum
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              ſe ipſo ſenſiſſe ait Albumazar. </s>
              <s id="s.001672">quibus etiam ex antiquis Seneca annumeran­
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              dus eſt. </s>
              <s id="s.001673">prędicti autem recentiores omnes varijs demonſtrationibus ex ac­
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              curata obſeruatione erutis illud certò certius confirmare contendunt:
                <expan abbr="idq́">idque</expan>
              ;
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              non in vno dumtaxat, ſed in
                <expan abbr="quinq;">quinque</expan>
              cometis; quorum demonſtrationes apud
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              Tychonem partim in progymn. </s>
              <s id="s.001674">partim in epiſt. fuſius explicatas reperies.</s>
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              <s id="s.001675">2. Quarum potiſſima illa eſt, quæ ex parallaxi, ſeu aſpectus diuerſitate
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              deſumitur, certiſſimum enim eſt lumen illud eſſe altero ſublimius, quod mi­
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              norem exhibet parallaxim: expertos autem ſe eſſe hi omnes, affirmant ho­
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              ſce quinque cometas multò minorem pati parallaxim, quam Lunam; imò
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              quempiam minorem, quàm Sol ipſe patiatur, quo poſito manifeſtè conuin­
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              ceretur eos omnes ſupra Lunam in ætherea regione effulſiſſe.</s>
            </p>
            <p type="main">
              <s id="s.001676">3. Ratio, qua etiam ante nouas obſeruationes vti ſolebant, deſumitur
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              ex motu cometæ diurno, quo ſcilicet oritur, & occidit, quemadmodum cæ­
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              tera ſydera, hoc eſt ſpatio 24. horarum diurnam conuerſionem circa totam
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              terram abſoluit. </s>
              <s id="s.001677">ſi igitur comete eſſet in ſublimiori aeris regione, vbi cæte­
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              ra ignita meteora collocantur,
                <expan abbr="mouereturq́">mouereturque</expan>
              ; diurno motu circa terram, ſe­
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              queretur neceſſariò eum tanta velocitate videri à nobis circumferri, vt po­
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              tius fulgor quidam, ſeu radius pertranſiens ab oriente in occidentem appa­
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              reret, quam ſtella quędam:
                <expan abbr="idq́">idque</expan>
              ; propter propinquitatem; aſtra enim ob ni­
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              miam diſtantiam videntur tardè moueri, quamuis velociſſimè moueantur.</s>
            </p>
            <figure id="id.009.01.092.1.jpg" place="text" xlink:href="009/01/092/1.jpg" number="52"/>
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              <s id="s.001678">Quod melius ex ſequenti figura
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                <expan abbr="cõuincitur">conuincitur</expan>
              , vbi circulus interior eſt
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              terra, cuius ſemidiameter A B. cir­
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              culus verò exterior eſt cometæ gy­
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              rus, quem ipſe ſpatio 24. horarum
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              percurrit, qui ſecundum veram pro­
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              portionem deberet adhuc ipſi terræ
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              propinquior, ac proinde minor eſſe,
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              iuxta aeris ſupremam partem. </s>
              <s id="s.001679">hori­
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              zon eſt recta D C, tangens terram in
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              B, vbi eſt oculus noſter, qui nihil in­
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              fra ipſam D C, videre poteſt; quare
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              ſi cometa 24. horarum totum gyrum
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              D C E, percurrit, non videbitur, niſi
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              quando percurret portionem D C,
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              ſupra horizontem; quæ quidem por­
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              tio,
                <expan abbr="neq;">neque</expan>
              ſemihoræ reſponderet, ſi fi­
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              gura iuxta veram proportionem conſtrueretur. </s>
              <s id="s.001680">experientia tamen conſtat,
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              cometas videri ſupra horizontem tot horis, quot ſtellæ fixæ, ſub quibus mo­
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              uentur: non ergo eſt in ſupremo aere. </s>
              <s id="s.001681">Quod ſi fiat figura, in qua exterior
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              cometæ ambitus adeò magnus ſit, vt ipſius portio D C, ſupra horizontem
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              exiſtens, reſpondeat tempori, quo cometa ſupra noſtrum pariter horizon­
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              tem ſpectatur, ea figura terræ ſemidiametrum A B. toties multiplicabit, vt
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              ipſi Lunæ circuitui proximè accedat.</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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