Apian, Petrus
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Cosmographia
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Appendix.
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<
s
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xml:space
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">ET ſi Coſinographicum opus Lector humaniſſ. </
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<
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">com
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cluſimus, hic tamen placuit oſtendere, quo modo
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horæ noctu ex lunari radiatione & </
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<
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echoid-s2073
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">ſtellarum non
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errantium motu venandæ ſint. </
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<
s
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">Crebris enim ac ſe
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dulis hortatibus à fratre meo Georgio Apiano ro
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gatus ſum, vt de horarum noctis obſeruatione ali
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quid ſcriberem: </
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<
s
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echoid-s2075
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">cuius precibus ſemel atq; </
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<
s
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echoid-s2076
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">iterum,
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vt potui, obtemperaui: </
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<
s
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echoid-s2077
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">illudq́ organum excogitaui atque ſubiunxi.
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</
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<
s
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echoid-s2078
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xml:space
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">Neminem quippe inficias ire arbitror, quòd permagna ſit delectatio
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in horarum noctis depræhenſione, quam & </
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<
s
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echoid-s2079
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">maximè ad Coſmogra-
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phicæ. </
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<
s
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">cognitionem ſcire oportet. </
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<
s
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echoid-s2081
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">Igitur de eius partibus dignoſcen-
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dis, paucula quædam & </
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<
s
xml:id
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echoid-s2082
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xml:space
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">notatu digna adnectere propoſuimus.</
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<
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</
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</
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<
head
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xml:space
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">¶ Horam vſualem noctu ex radiis lunaribus mediante
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Compaſſo propè verum cognoſcere.</
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<
s
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echoid-s2084
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xml:space
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">LVna radiante, aptabis Compaſſum (vt aſſolet) ſu-
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per aliquo plano, ita, quòd lingulæ ſeu forcellulæ
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correſpondeant: </
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<
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">deinde conſidera horam quam
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vmbra fili palàm facit. </
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<
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echoid-s2086
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">Poteris etiam, ſi placet, ex
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alio quocunque ſiue verticali ſiue horizontali in-
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ſtrumento, horam lunarem obſeruare: </
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<
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">cum qua in
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tra rotulam ſequentem, & </
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<
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">quære conſimilem ho-
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ram in horis dierum, hoc eſt, in ſuperiori ſemicirculo, ſuper quam ſta
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tuatur index lunaris cum ſua linea fiduciæ, & </
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<
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echoid-s2089
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">firmato indice, circun
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uolue rotulam cum indice Solis, tam diu, donec eius linea fiduciæ
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ſuper ætatem lunæ incidat. </
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<
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">Tunc enim in horario limbo, Solis in-
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dex horam quæſitam oſtendit.</
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<
head
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xml:space
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">¶ Aliter idem arithmetica ſupputatione indagare.</
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<
s
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">COnſidera horam quam radius lunaris in Compaſſo, vel
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quocunque inſtrumento ſcioterico demonſtrat, & </
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<
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">eam
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ſerua. </
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<
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">Deinde multiplica ætatem lunæ cum. </
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</
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<
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">& </
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<
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">quod exit, diuide per. </
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<
s
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">quotientem iunge
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cum horis prius ſeruatis, exit hora noctis quæſita.</
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<
head
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style
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">¶ Idem faciliori computo inueſtigare.</
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<
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">DVc ætatem lunæ in. </
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<
s
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">731. </
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<
s
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">numerum, ex hac multiplicatione
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procreatum, diuide per. </
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<
s
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">900. </
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<
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">quotiens oſtendit horas adden-
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das, reſiduum diuide per. </
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<
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<
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">fient minuta horarum.</
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</
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<
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<
head
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">¶ Sequitur inſtrumentum Noctis.</
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