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# Title: Nicolai Mercatoris Holsati, è Soc. Reg. Institutionum Astronomicarum Libri Duo, De Motu Astrorum Communi & Proprio, Secundum Hypotheses Veterum & Recentiorum præcipuas; Deqve Hypotheseon ex observatis constructione (shelfmark Leibn. Marg. 63)
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Sect. 4.
ASTRONOMTA.
Purare retrO vel porro, eA vera conjunctionis momentum s
in altero capur calculi à rila conjunctione procedir. Sic isitur
pro moru apparenti Lunxe in priori intervallo Regula prior
lixC: Ad urrumque terminum interralli dari, hoc ett, ad
tempus conjunctionis verx, nec non ad punctum cemporis
quo Luna vero moru à Sole abest, quancum parallaxis lon-
vicudinis rempore verae conjunctionis valet, in promeu (IC
Parallaxis longitudinis, aeque harum parallaxeon differentir
capiatur. Tum si parallaxis longicudinis ad tempus con-
junctionis verae major fuerit, quam parallaxis alceri inter-
valli termino congruens; addes differentiam parallaxeom
Parallaxi verae conjunctionis arriculo respondenti, e ha-
Debis morum Lura apparentem pro dicto incerrallo 
lin parallaxis verae conjunctioni comperens minor (ic al-
cerius termini parallaxi, auteres differemiam parallaxeon
ex parallaxi, quae verx conjunctioni responder, e rursus ex-
tabie mocus Lunae apparens pro dicto incerrallo. Ratio-
Dem hujus operarionis li requiris, considerato, quod l
Parallares ad urrumque dari incerralli terminum esfent x qua-
les, tum morus apparens Luna morui vero equalis toret.
Duare tancum differe OrUS APPaTeNS a MOTUI VerO, QuanEL
est parallaxeon differencis. Praeterea sciendum eAt, omnes
Parallares adducere lidus ad Hlorizoncem propiius; quam
ex cenrro relluris spectandum forer. Juare in quadrance
Lodiaci Orientali majores parallaxes masis adjurane motum
Lunx proprium versus ortum, sicuri minores parallaxes
Cundem MINUS PTOMOVeNE. Ec cum in eodem quadrance
Oriencali semper vera conjunctio sequatur vilam, acque ob
hioc eriam alrerum nostri incervalli cerminum, qui semper à
vera conjunctione ad vilam cendic; necesse est, ut sequens
ille verx conjunctionis rerminus, li minori parallaxi adju-
vecur, quam praecedens, minus promoreat Lunam versus
Orrumm; adeogne mOTuS apparens vero minox eradat, unde
difterencia parallareon morui vero detrahenda venic, ut tar
orus apparens. Contrarium erenit; guando polterior
hoc cAt, verx. conjunctionis) cerminus m jori parallaxI
2dju