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# Title: [Philosophiae Naturalis Principia Mathematica] Philosophiæ Naturalis Principia Mathematica (shelfmark Leibn. Marg. 166)
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III.
E D IT O R IS
cum nullam ejus sensibilem imminutionem, rel in alcistimis moneium
cacuminibus, observare licet. Cravitat itaque Luna in Terram:
quin ec actione mucua, Terra vicistim in Lunam aequaliter gravitat:
id quod abunde quidem contirmatur in hac Philolophia, ubi 29i-
cur de Mlaris aectu ec Aquinocciorum praecestione, ab aetionc eum
l. unae cum Solis in Terram oriundis. Hlinc ec illud eandem cdo.
cemur, qua nimirum lese ris Graricatis decreleat in majoribus a
Tellure distanciis. Nam cum Graritas non diverta (E a Vi cen-
eriveta Lunaris haec vero Ec reciproce proportionalis quadrato
dictanciae; diminuetur ee Craritas in eadem rationc.
Progrediamur jam ad Planecas reliquos. Duoniam revolu-
ciones primariorum circa Solem ee secundariorum circa forem et
Sacurnum Cunt Phaenomena generis ejuldem ac revolucio Lunx
circa Terram, Quoniam porro demonstratum cA vires centripecas
primariorum dirisi versus cenerum Solis, secundariorum versus
centra foris e Saturni, quemadmodum Lunae ris centripeta versus
Perrae centrum dirigitur; adhaec, quoniam omnes illae rires lunc
reciproce uc quadrata distanciarum a centris, quemadmodum vis
Lunae est ut quadratum dictantix a Terra: concludendum erit
eandem esc naturam universis. Leaque ut Luna gravitat in Per-
ram, ec Terra ricissim in Lunam; sic etiam gravicabunt omnes
secundarii in primarios suos, ec primarii vicissim in secundarios;
lic ec omnes primarii in Solem, ec Sol vicistim in primarios.
Isitur Sol in Planetas universos gravitat ex universi in Solem.
Ntam secundarii dum primarios Cuos comitantur, revolvuntur in-
terea cireum Solem una cum primariis. Lodem itaque argumento,
veriusque generis Planetae gravitane in Solem, ec Sol in ip(os.
Sccundarios vero Planecas in Solem gravitare abunde infuper
constat ex inaequalitatibus Lunaribus; quarum accuratissimam
Theoriam, admiranda sagacirate paretactam, in terrio hujus Operis
libro expositam habemus.
Solis virturem actractiram quoquorertum provagari ad ingen-
ces usque distantias, ec sele diffundere ad singulas circumjecti (pa-
cii partes, apertissime colligi porest ex moru Comctarum; qui ab
immensis interrallis profecti feruntur in viciniam Solis, ex non-
nunquam adeo ad iplum proxime accedune ut Globum ejus, in
Periheliis suis verlantes, cancum non continsere rideaneur. I0-
rum Theoriam ab AAronomis antehac Frustra quaelicam, noctro
tandem Execulo feliciter inventam ex per Obserrationes certil-
sime demonstracam, Praectantissimo nostro Auctori debemuS. PatCE
iGIEUF