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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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dect. 3.
ASTRONOML
a Sole congruens tali anomalix medix Planeta, qualem
lunc cemporis obcinet, e quidem in parribus, qualium dix
ctancia media celluris à Sole continet 100000. Tum sup-
Dolita tantisper etiam distantia mediâ Planecae parrium
100000. Si ad eandem anomaliam mediam compures di-
ltantiam ejus à Sole; poceris deinde insticuere analogiam
hoc modo: Uc distantia Planetae polterius inventa, ad prius
nventam; ita 100000 ad distanciam ejusdem à Soleme-
diam in parribus, qualium distancia media Telluris continet
100000.
PRODLLMI LLLLC
Planetae cujusque nodos es inclinationem
maximam eruere.
Ligendae sunt dux obserrationes, in quibus PlanerX
Clacieudo incidat in eundem orbita quadranrem. Ps
enim, ne lis nescius, a nodo ascendenre ad limirem boreum
quadrans primus, in quo lacitudo est seprentrionalis alcen-
dens; a liire boreo ad nodum descendenrem in quadrance
decundo lacirudo est sepcentrionalis descendens; inde ad
imirem australem lacirudo est meridionalis descendens, de
hique a limire australi ad nodumm ascendencem latiendo est
meridionalis ascendens. Ergo ad ucramque observationem
in promun sic locus Planetx Hseliocentricus calculo inquiren-
dus, nec non longitudo ex lacirudo ejusdem observando de
prehenta. A latiindine porro ad inclinationem argues hOC
modo: Uctinus anguli ad cerram, ad sinum anguli ad Solem;
ita tangens lacicudinis observatae, ad rangenrem inclinarionis.
lexe inclinationes, sive distantix Planece ab Fcliprica ex
sole spectarx, sinc Figura L. X LL. arcus D A eC C+ B. Frenim
E. C. retert celipricam, cujus poli sune F, F; OR est orbita
lanera politi in A in prima obserrarione, e in secunda in B;
STautet