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

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1mobilis, uſque ad X gradus, & XLV minutos in arietis e­
iuſdem eclipticæ mobilis: & quantitas uniuſcuiuſque horum
graduum eſt XXI gradus, XXX minutos.
maxima enim di­
ſtantia capitis arietis, & libræ mobilium à ſeptione eclipticæ
mobilis cum æquinoctiali eſt per gradus X, & XLV minu­
tos eclipticæ mobilis in piſcibus, & per X gradus, & XLV
minutos eclipticæ mobilis in ariete; qui aggregati faciunt
arcum XXI gradus, et XXX minutos eclipticæ mobi­
lis: et idem eſt ex parte libræ mobilis: unde accidit, quòd
maxima declinatio eclipticæ mobilis, ideſt octauæ ſphæræ ua­
riabilis eſt, maior quandoque declinatione eclipticæ fixæ, ideſt
quandoque minor eadem, quandoque ſibi æqualis.
tunc enim
maxima declinatio eclipticæ octaua mobilis eſt æqualis maxi­
mæ declinationi eclipticæ nonæ fixæ; quando ecliptica mobi­
lis eſt collocata in ſuperficie eclipticæ fixæ; quod accidit capi­
tibus arietis, et libræ mobilibus exiſtentibus in ſectionibus
ſuorum circulorum paruorum cum ecliptica fixa.
maior uero
capitibus arietis, et libræ mobilibus exiſtentibus in ſectioni­
bus contactuum.
in punctis ſuorum circulorum paruorum
diſtinguentibus quartas eorum circulorum à ſectionibus eo­
rum cum ecliptica fixa: unde eam Ptolomæus inuenit XXIII
gradus, LI minut.
et XX ſecund. minor autem in ca­
pite arietis, et libræ mobilia fuerint in punctis interſectionis
ſuorum circulorum paruorum cum æquinoctiali.
tunc enim
interſectio eclipticarum erit in puncto eclipticæ mobilis, ideſt
octauæ: maxima declinatio ab æquinoctiali, qui minus decli­
nabit, quàm caput cancri, et capricorni ecliptica fixa, ſeu no
næ.
æquatio autem octauæ ſphæræ eſt arcus eclipticæ octauæ
ſphæræ, uſque ad interſectionem eclipticæ octauæ ſphæræ cum
æquinoctiali; ſed motus acceſſus, et receſſus eſt arcus circuli
parui ab interſectione circuli parui cum æquinoctiali occiden
tali per medietatem circuli parui ſeptentrionalem, progre­
diendo, uſque ad caput arietis octauæ ſphæræ in ſuo circulo
paruo.
hoc motu octauæ ſphæræ dicto contingit, ut ſtellæ fi­
xæ in octauo cælo uideantur nunc moueri uerſus occidentem,

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