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# Title: [Philosophiae Naturalis Principia Mathematica] Philosophiæ Naturalis Principia Mathematica (shelfmark Leibn. Marg. 166)
# Folio 404, page id 1041163592:0438
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404
PHTLOSODHLE NATORALIS
DE Movor Eclipricae; 8 q Ouadraturas Lunx in plano Felipeieaes de pX
PFSTEMATE perpendiculum in lineam Ag Ouadraturis interjacencem. Vis
Solis ad perturbandum motum LUna (PeF PFOD. XXV.) duplex cA,
altera lineae L MB altera linexe MT proportionalis. EF Luna vi
priore in Terram, posteriore in Solem secundum lineam rectae 57
2 Terra ad Solem ductae parallelam cranieur. Vis Orior P M
asic secundum planum orbis Lunaris, ec propterea sicum plani nil
mutaL. Ilaec isitur nesligenda est. Vis posterior MT qua planum
Orbis Lunaris perturbatur eadem est cum vi 3 FR vel ZTY.
REF HaC ViS (PEF PEOP. XXV.) est ad rim qua Luna in circulo circa
Terran quiescentem tempore TuO PCTTOCLCO ANHOrmICEr revolvi
PonCE, uE 3LL au Radium circuli mulciplicatum per Mumerum
178, 725. sive uE TT ad Radium mulciplicatum per 59,575u
rum i hoc calculo e eo omni qui sequitur, considero lincas om-
nes LLuna ad Solem ductas tanquam parallelas lineae quae a lerra
ad Solem ducitur, propterea quod inclinacio tantum Pere minu
effectus omnes in aliquibus casibus, quancum auset in aIS; l
Nollorum mocus mediocres quaerimus, neslectis  ChImu-
eiis, quae calculum nimis im C.