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. </
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<
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>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. </
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<
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>quæ autem ſunt
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ſupra orizontem, dicuntur quartæ diurnæ; & quæ ſunt ſub
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orizonte, dicuntur quartæ nocturnæ. </
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<
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>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. </
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<
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>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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<
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>quartæ autem, in quibus fit refluxus, ſeu decrementum;
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ſunt quarta, quæ eſt à meridie ad occaſum ſupra
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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. </
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<
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>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. </
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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. </
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<
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>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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<
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>& iſta quatuor puncta diſtant adinuicem per quartam cæli.
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<
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>fortium duo ſunt fortia pro fluxu, ſeu cremento, & duo pro
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refluxu, ſeu decremento. </
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<
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>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, & </
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