Chap. i. PHILOSOPHY.

i6l

,r. as*.-

BOOK II.

CONCERNING THE

SYSTEM of the WORLD*

Chad. I.

That the Planets move in a Ipace empty ofall senlible matter,

H AVE now gone through theErst part os my design, and have ex-plained, as far as the nature of myimdertaking would permit, whatSir I s a a c Newton has deliveredin general concerning the motionof bodies. It follows now to speakbf the discoveries* he has made in the lystem of the world;

Y and

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