Clavius, Christoph
,
In Sphaeram Ioannis de Sacro Bosco commentarius
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Comment. in I. Cap. Sphæræ
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cit enim grad. </
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<
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">360. </
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<
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<
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xml:space
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">& </
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<
s
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xml:space
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">quarta 31. </
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>
<
s
xml:id
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"
xml:space
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">Hoc autẽ ſpaciũ, ſeu tempus 49000.
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</
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>
<
s
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="
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xml:space
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">annor
<
unsure
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ũ appellari ſolet à pleriſq; </
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>
<
s
xml:id
="
echoid-s2753
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xml:space
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">annus Platonicus. </
s
>
<
s
xml:id
="
echoid-s2754
"
xml:space
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">Hoc enim interuallo ſidc-
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<
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xlink:label
="
note-092-01
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xlink:href
="
note-092-01a
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xml:space
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">Annus Pla-
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@oni@@s.</
note
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ra omnia ad eundem ſitum redi
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tura autumant; </
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<
s
xml:id
="
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xml:space
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">Immo quidam volunt, tunc
<
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omnia quæcunque in mundo ſunt, eodem ordine eſſe reditura, quo nunc cer
<
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nuntur. </
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>
<
s
xml:id
="
echoid-s2756
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xml:space
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">Sed temerè hoc aſſerere videntur. </
s
>
<
s
xml:id
="
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xml:space
="
preserve
">Cum enim ſecundũ pleroſque mo-
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tus cælorum ſint inter ſe incommenſurabiles, fieri non poteſt, vt vnquam om-
<
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nia ſidcra eundem ſitum & </
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>
<
s
xml:id
="
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"
xml:space
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">ordinem, quem nunc habent, aut olim habuerunt,
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obtinere poſſint. </
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>
<
s
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xml:space
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">Mouit aũt fortaſſis Alphonſum Regem, vt aſſereret periodũ
<
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huius motus compleri in ſpacio 49000. </
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>
<
s
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xml:space
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">annorum, quoniam videbat ſuo tem-
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pore Aequinoctia, & </
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>
<
s
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xml:space
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">ſolſtitia quotannis in Calendario retrocedere per Min.
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</
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<
s
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">10. </
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<
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<
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<
s
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">vnius horæ: </
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<
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">Et in annis 400. </
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>
<
s
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">per dies ferme 3. </
s
>
<
s
xml:id
="
echoid-s2768
"
xml:space
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">Ita vt in dicto ſpacio
<
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annorum 49000. </
s
>
<
s
xml:id
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"
xml:space
="
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">ad priſtinã quaſi ſedem redeant. </
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>
<
s
xml:id
="
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xml:space
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">Ptolomęus autem aſſeuerat,
<
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/>
hunc motũ perfici in 36000. </
s
>
<
s
xml:id
="
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xml:space
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">annorum circulo, ita vt Nonus orbis vnũ gradum
<
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percu@rat in 100. </
s
>
<
s
xml:id
="
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xml:space
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">annis. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">Albategnius vero vult, iſtum motum abſolui ſpacio
<
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/>
23760. </
s
>
<
s
xml:id
="
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xml:space
="
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">annorum, ita vt peragret vnum gradum in 66. </
s
>
<
s
xml:id
="
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"
xml:space
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">annis. </
s
>
<
s
xml:id
="
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"
xml:space
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">Qua vero de cau-
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ſa tam varie de periodo huius motus ſenſerint Aſtronomi mox declarabitur: </
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>
<
s
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xml:space
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">
<
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<
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xlink:label
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note-092-02
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note-092-02a
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xml:space
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">Quilibet or
<
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bis mouet
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ſuo motu
<
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inferiorem
<
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ſibi conti-
<
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guum.</
note
>
Nunc ratum ſit, & </
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>
<
s
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xml:space
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">certum, Nonum orbem motu iſto tardi
<
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ſſimo ab occidente
<
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in orientem trahere ſecum 8. </
s
>
<
s
xml:id
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xml:space
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">inferiores ſphæras celeſtes, nullo vero
<
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pacto ſu-
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premam ſphæram. </
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>
<
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xml:space
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">Iuxta enim ſententiam Aſtronomorum, qnicunque orbis ſu
<
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perior ſuo motu circunfert inferiorem ſibi contiguum, & </
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>
<
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xml:space
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">concentricum, non
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autem ſuperiorem.</
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<
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</
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<
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<
s
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">OCTAVVS orbis præter duos iſtos motus prædictos ſibi ab alienis or-
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bibus impreſſos, peculiarem adhuc, & </
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>
<
s
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">proprium motum habet, quem vocant
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motum acce
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ſſus, & </
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>
<
s
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">receſſus, ſeu motum trepidationis, vt ſupra d@ximus. </
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>
<
s
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">Hic au
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tem motus fit ſuper principia ♈, & </
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<
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">♎, nonæ ſphæræ, tanquã polos. </
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<
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">Principia
<
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<
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note-092-03
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">Motus tre-
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pidationis.</
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enim ♈, & </
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<
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">♎, octauæ ſphæræ circa initia ♈, & </
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<
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">♎, nonæ ſphæræ, deſcribũt cir-
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culos quoſdam paruos, quorum ſemidiametri continent 9. </
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<
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">grad. </
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<
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">Tantũ enim
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diſt
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ãt initia ♈, & </
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>
<
s
xml:id
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xml:space
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">♎, octauę ſphæræ à principijs ♈, & </
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<
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">♎, nonæ ſphæræ, iuxta
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doctrinam Alphonſi Regis. </
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<
s
xml:id
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xml:space
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">Ex hoc vero motu principiorum ♈, & </
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<
s
xml:id
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">♎, octauæ
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ſphæræ circa principia ♈, & </
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<
s
xml:id
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xml:space
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">♎, nonæ ſphæræ conſequitur, nullum aliud pun-
<
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ctum octaui cæli circulum perfectum abſoluere, ſed quodãmodo titubare, hoc
<
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eſt, nunc accedere ad polum arcticũ, & </
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<
s
xml:id
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xml:space
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">ab antatctico remoueri, nunc vero à po-
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lo ar
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ctico diſcedere, & </
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>
<
s
xml:id
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">ad antarcticum accedere. </
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>
<
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xml:id
="
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xml:space
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">Periodus iſtius motus cõple-
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ctitur ſpacium 7000. </
s
>
<
s
xml:id
="
echoid-s2801
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xml:space
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">annorũ, ita vt ſi diuidantur circuli illi parui in 360. </
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>
<
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xml:id
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</
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<
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xml:id
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">in 20. </
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<
s
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xml:space
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">annis fere vnus gradus abſoluatur. </
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>
<
s
xml:id
="
echoid-s2805
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xml:space
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">Hoc etiam motu orbes omnium pla-
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netarum, mouentur, cum ſint cũ octaua ſphæra concentrici. </
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>
<
s
xml:id
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xml:space
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">Sed vt verum fa-
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i
<
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eamur, licet propter phænomena, ſeu apparentias, quas paulo poſt adduce-
<
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mus, neceſſariò concedendus videatur huiuſmodi motus in octaua ſphæra, vel
<
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aliquid ſimile, tamen valde incertum eſt, eum ita fieri, vt Alphonſini docent. </
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<
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Multa enim abſurda illum conſequi videntur, vt alibi docebimus.</
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<
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</
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<
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<
s
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">SATVRNI globus præter dictos tres motus, habet motum proprium,
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quem conficit ab occidente in orientem annis 30. </
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<
s
xml:id
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echoid-s2810
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">fere. </
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<
s
xml:id
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echoid-s2811
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xml:space
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">Singulis namque die-
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bus peragrat in Zodiaco minuta quaſi 2. </
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<
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">& </
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<
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">tertia 35.</
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<
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</
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<
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<
s
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">IVPPITER ſuum circuitum explet 12. </
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<
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">fere annis. </
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<
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xml:id
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pertranſit min. </
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<
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<
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<
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<
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<
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<
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</
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<
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<
s
xml:id
="
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xml:space
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">MARS abſoluit ſuum motum ab occaſu in ortum annis fere 2. </
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>
<
s
xml:id
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echoid-s2825
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xml:space
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">Percurrit
<
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enim in Zodiaco quouis die min. </
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<
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<
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<
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">26. </
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<
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xml:id
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<
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">38.</
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<
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</
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<
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>
<
s
xml:id
="
echoid-s2832
"
xml:space
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">SOL conficit ſuum iter ab occidente in orientem diebus 365. </
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>
<
s
xml:id
="
echoid-s2833
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">horis 5. </
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