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

Table of figures

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              FEDERICI DELPHINI
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              DE MOTV OCTAVAE
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              SPHAERAE
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              TRACTATVS.
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              <s>SCIENDVM eſt primo, quòd circa numerum ſphæra­
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              rum cæleſtium tres ſunt opiniones diuerſæ: una eſt philoſo­
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              phorum, & aſtrologorum Indorum, quæ eſt, quòd ſphæræ
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              cæleſtes ſint octo tantum, uidelicet ſeptem ſphæræ planeta­
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              rum, & octaua ſphæra ſtellata, quæ eſt primum mobile ſecun
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              dum iſtam opinionem; quæ mouetur motu diurno, uidelicet
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              in una die naturale, quæ eſt tempus uiginti quatuor hora­
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              rum, una reuolutione completa, ab oriente ſcilicet uerſus oc
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              cidentem, reuoluendo ſecum tali motu omnes alias ſphæras
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              inferiores. </s>
              <s>alia eſt Ptolomæi, Alfragræni Alchabitii, Ioannis
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              de Sacrobuſto, & Thebit; qui ſphæræ cæleſtes ſint nouem:
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              & hæc opinio eſt bipartita, quia Ptolemæus, Alfragrænus Al­
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              chabitius, & Ioannes de Sacrobuſto dicunt, quòd nona ſphæ
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              ra eſt primum mobile, & quòd ipſa eſt illa, quæ mouetur mo
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              tu diurno, reuoluendo omnes alias ſphæras inferiores, uide­
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              licet octauam, & ſeptimam ſphæram ſeptem planetarum ſe­
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              cum: & quòd octaua ſphæra, & aliæ inferiores ei mouentur
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              duplici motu: uno uidelicet diurno, quo reuoluuntur à nona
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              omni die naturali, una reuolutione completa: & alio pro­
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              prio octauæ tardo, ſcilicet ad contrarium nonæ ſphæræ ſuper
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              polis zodiaci ſui exiſtentibus in directo polorum zodiaci no­
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              næ ſemper; adeo quòd ſemper zodiacus octauæ eſt ſub zodia­
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              ci nonæ ſphæræ eclipticæ octauæ ſub ecliptica nonæ, & poli
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              zodiaci octauæ ſub polis zodiaci nonæ, in centum annis uno
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              gradu uerſus orientem contrariæ, & taliter, quòd ſemper e­
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              clipticæ octauæ ſphæræ eſſent ſub ecliptica nonæ. </s>
              <s>aliæ autem
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              ſphæræ inferiores octauæ, ultra iſtos duos motus, habent
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              motus ſibi proprios ab occidente uerſus orientem, ut in </s>
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