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# Title: [Philosophiae Naturalis Principia Mathematica] Philosophiæ Naturalis Principia Mathematica (shelfmark Leibn. Marg. 166)
# Folio 408, page id 1041163592:0442
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408
PFTTLOSOPHILS NATDRALIS
PROPOSITIO ZXZI PROBLEMA XII
Invenire morum horarium Nodorum Lunae in Orbe Flliptico.
Designet Qpmag Fllipsin, axc majore 3g, minore ab de-
Scripeam,  Ag Circulum circumscriptum, F Terram in urriusque
cenero communis SSolem, p Lunam in FIlipsI motam, ex p m ar-
cum quem data temporis particula quam minima describie, N et n
Nodos linca Nn junctos, pK ec mk perpendicula in axem g
demissa ex hinc inde producta, doncc occurrant C irculo in P &e M,
eto, arcalm deleribat tempori peopoloae di diud itelli in
EIiDA uE ACd p D dm.
ec linexe Nodorum in D ec d. FE S Lunas radio ad Terram du.
Na A P F eangat Crculum in L, et producta occurrat LI
in F, ee pF cangat Ellipsim in P et producta occurrat cidem LN
DE MIONDI
SYBTEMATE