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BOOK I.

Concerning the

MOTION of BODIES

IN GENERAL.

Chap. I

Of the LAWS of MOTION.

A VIN G thus explained Sir IsaacNewton’s method of reasoning inphilosophy, I shall now proceed tomy intended account of his discove-ries. These are contained in two trea-tises. In one of them, the Mathema-tical PRINCIPLES OF NATURAL PHILOSO-PHY, his chief design is to shew by what laws the heavenly

E x motions