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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)
# Folio 143, page id 820424455:0165
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002
ASTRONOMIA.
cujus morus annuus paricer ac diurrus supponitur regula-
rillirmus. Acque annui quidem morus regularitas percipicur,
i centrum relluris Retae in ponatur in aequatoreru 270 quo-
cidie cancundem promoveri, ac diurni mocus regularitas
consistir in eo, quod ubicunque sellus desit in vera lua Or-
Dira, Cemper Meridianus ejus quilibet revolvicur eodem rem-
Poris spario ad eundem cum coluro xquinoctiorum  O p2.
callelismum, quae quidem rerolurio restirueret quoque cun-
dem Meridianum ad Solem, si absque moru annuo Torer.
_ cenrrum m semper haereret in eodem puncto xquatoris:
denunc, dum centrum cerrae moverur am adm, non sufticie
meridionum os mocu diurno circumactum rediisse ad cundem
Parallelismum cum linea rO; etenim meridianus eu, qui,
cellure inn, dirigebatur ad Solem, promoci eadem ad m
etiam si redear ad suum parallelismum os, nondum camen in
Solem dirigicur, nili amplius volura os, donce in candem
rectam cum Bm F C incidar. Nimirum, quantum centrum
celluris protecir am ad m, tancundem os Meridianus ulera
obrencum cum ea parallelismum conticere deber, antequam
Coincidat cum B m P C); adeoque in Solem dirigarur, liqui-
dem anguli mO m (sive arcus rm) e Bmo (vel sm O)
lunc aequales. Unde sequitur, morum cujusque meridiani
diurnum a Sole ad Solem, continere inceerum revolurionem
ad eundem parallelismum cummo, ex in super ejusdem re-
rolurionis porrionem aegnalem mocui centri terrae ab aequi
noctio conticiendo interca, dum idem ille merisianus ad
Solem revolvitur. Praecerea ponamus veram rellurem in
eeliprica in V puncto vertantem, rerolurionem suam circa
axem proprium moderari eadem lege regulariratis, qua d
cellus ficta in m, nimirum meridianum aliquem celluris vera
qui semel parallelus luerie meridiano alicui relluris ficta
m, cundem quoque semper eidem parallelum manere; quod
limilicer accipiendum de cellure per fictionem polira in quovis
alio puncto, v. Br. in M, r, 2, _C. Hinc jam promtum cst
incelligere aequarionem remporis, quae nihil aliud elt. quam
areus aequacoris rm incer ralcentionem rectum selluris vers