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# Title: [Philosophiae Naturalis Principia Mathematica] Philosophiæ Naturalis Principia Mathematica (shelfmark Leibn. Marg. 166)
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AVCTORIS PRAFATIO.
N hac Secunda Principiorum Fditione, multa sparsim emen-
 dantur e nonnulla adjiciuntur. In Libri primi Sectione II,
Tnventio virium quibus corpora in Orbibus datis revolvi possent,
facilior redditur ex amplior. In Libri secundi Sectione VII,
Theoria resistentiae Eluidorum accuratius investicatur es novis
Fxperimentis confirmatur. In Libro tertio Theoria Lunae ∞ Prae-
cessio squinoctiorum ex Principiis suis plenius deducuntur, es
Theoria Cometarum pluribus  accuratius computatis Orbium
exemplis consirmatur.
Babam Condinis
Mat. 2.B. 17C3.
S. RFWTON.