Delfino, Federico, De fluxu et refluxu aquae maris, 1559

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        <body>
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            <p type="main">
              <s>
                <pb xlink:href="024/01/068.jpg"/>
              nonæ, & quando ſecat eam, ſemper ſecat eam in capitibus ca­
                <lb/>
              pricorni, & cancri octauæ. </s>
              <s>nam hæc duo puncta eclipticæ octa
                <lb/>
              uæ ſphæræ, uidelicet capita cancri, & capricorni octauæ utrin
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              que à capitibus cancri, & capricorni nonæ recedunt per quan
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              titatem IX grad. & reuertuntur; & in tali eorum motu ſemper
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              circumferentiæ eclipticæ nonæ
                <expan abbr="cohærẽt">cohærent</expan>
              , & nuſquam ab ea re­
                <lb/>
              cedunt à capitibus cancri, & capricorni, quæ quantitate IX
                <lb/>
              grad. ut dictum eſt, recedunt. </s>
              <s>Purbachus autem dixit capita
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              cancri, & capricorni octauæ recedere ab ecliptica nonæ ſphæ­
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              ræ, & deſcribere quaſdam figuras connidatas utrunque à ca­
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              pitibus cancri, & capricorni, quæ
                <expan abbr="habẽtes">habentes</expan>
              pro baſilias curuas,
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              quod non uidetur mihi eſſe uerum: quia ex quo puncto ecli­
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              pticæ octauæ ſphæræ, quæ incipiunt recedere ab ecliptica no­
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              næ, ſunt capita arietis, & libræ octauæ ſphæræ. </s>
              <s>uidetur, quòd ip
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              ſa
                <expan abbr="debeãt">debeant</expan>
              eſſe
                <expan abbr="pũcta">puncta</expan>
              maximæ latitudinis eclipticæ octauæ ſphæ
                <lb/>
              ræ ab ecliptica nonæ: cum autem à puncto maximæ latitudinis
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              duorum circulorum maiorum ſe inuicem ſecantium ad utraſ­
                <lb/>
              que ſectiones ſit quarta circuli à capitibus arietis, & libræ octa
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              uæ ſphæræ ad utraſque ſectiones ſemper erit quarta circuli;
                <lb/>
              ſed à capitibus arietis, & libræ octauæ ſphæræ ad capita cancri,
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              & capricorni, eiuſdem ſunt quarta eclipticæ octauæ. </s>
              <s>ergo ſectio
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              eclipticarum ſemper erit in capite cancri, & capricorni octauæ,
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              ut bene dixit Thebit. </s>
              <s>& etiam hoc conſidero, unde fit, quòd
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              quando unus dictorum punctorum duorum eclipticæ octauæ
                <lb/>
              ſphæræ, quæ principia arietis, & libræ eiuſdem uocantur, eſt im
                <lb/>
              mediate ſui circuli parui meridiana ab ecliptica nonæ ſphæræ:
                <lb/>
              alter eſt immediate ſui circuli parui ſeptentrionalis eclipticæ
                <lb/>
              etiam octauæ ſphæræ, quando ſecatur ab ecliptica nonæ, ſem­
                <lb/>
              per ſecatur ab ea in partes æquales, uidelicet in duas medieta­
                <lb/>
              tes: & quando ipſa ſecat circulos paruos, portiones circulo­
                <lb/>
              rum paruorum ſectæ ab ea ſunt alternatim æquales, uidelicet
                <lb/>
              portio
                <expan abbr="ſeptẽtrionalis">ſeptentrionalis</expan>
              unius
                <expan abbr="eorũ">eorum</expan>
              eſt æqualis meridionali alteri­
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              us: & meridionalis illius
                <expan abbr="ſeptẽtrionali">ſeptentrionali</expan>
              alterius. </s>
              <s>uelocitas autem
                <lb/>
              motus uniuſcuiuſque duorum capitum, uidelicet arietis, &
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              libræ octauæ ſphæræ in circumferentiis duorum circulo­
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              rum paruorum eſt iſta, uidelicet quilibet duorum punctorum </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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