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

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              in tractatu meo de ſphera, ſemper ſecat ei cælum in duo me­
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              dia, & medietas cæli ſemper eſt ſupra orizontem eius, &
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              medietas infra. </s>
              <s>cum autem in omni medietate corporis ſphe
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              rici contineantur duæ quartæ: duæ quartæ cæli ſemper e­
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              runt ſupra orizontem eius, & duæ infra. </s>
              <s>quæ autem ſunt
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              ſupra orizontem, dicuntur quartæ diurnæ; & quæ ſunt ſub
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              orizonte, dicuntur quartæ nocturnæ. </s>
              <s>harum autem qua­
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              tuor quartarum cæli duæ ſunt, in quibus fit fluxus, ſeu cre­
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              mentum aquæ maris; & duæ, in quibus fit refluxus, ſeu de­
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              crementum aquæ maris. </s>
              <s>quartæ, in quibus fit fluxus, ſeu
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              crementum, ſunt quarta, quæ eſt ab ortu ad meridiem ſupra
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              orizontem; quæ eſt quarta acceſſionis diurnæ, ſeu crementi
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              diurni: & quarta ei oppoſita, quæ eſt ab occaſu ad medium
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              noctis ſub orizonte: quæ eſt quarta acceſſionis nocturnæ.
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              <s>quartæ autem, in quibus fit refluxus, ſeu decrementum;
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              ſunt quarta, quæ eſt à meridie ad occaſum ſupra
                <expan abbr="orizontẽ">orizontem</expan>
              ;
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              quæ eſt quarta acceſſionis diurnæ: & quarta ei oppoſita,
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              quæ eſt à medio noctis ad ortum ſub orizonte; quæ eſt quar
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              ta receſſionis nocturnæ. </s>
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              <s>Sciendum eſt etiam ſecundo, quòd octo ſunt puncta in cælo
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              pro fluxu, & refluxu, ſeu cremento, & decremento aquæ
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              maris: quorum quatuor ſunt fortia, & quatuor debilia. </s>
              <s>de­
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              bilium duo ſunt debilia pro fluxu, ſeu cremento, & duo pro
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              refluxu, ſeu decremento: debilia pro fluxu, ſeu cremento,
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              ſunt punctum orientis, & punctum occidentis, quæ ſunt
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              principia duarum quartarum fluxus. </s>
              <s>debilia pro refluxu,
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              ſeu decremento, ſunt punctum meridiei, & punctum me­
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              diæ noctis, quæ ſunt principia duarum quartarum refluxus.
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              </s>
              <s>& iſta quatuor puncta diſtant adinuicem per quartam cæli.
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              </s>
              <s>fortium duo ſunt fortia pro fluxu, ſeu cremento, & duo pro
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              refluxu, ſeu decremento. </s>
              <s>fortia pro fluxu, ſeu cremento,
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              ſunt punctum medium inter orientem, & meridiem in quar
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              ta diurna fluxus, diſtans ab oriente per 45 gradus (& à me­
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              ridie ſimiliter: & punctum medium inter occidentem, & </s>
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        </body>
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