Today's installment concludes Discovery of Gravity,our selection from Memoirs of the Life, Writings and Discoveries of Sir Isaac Newton by Sir David

If the peculiar genius of Newton has been displayed in his investigation of the law of universal gravitation, it shines with no less luster in the

The Principia consists of three books. The first and second, which occupy three-fourths of the work, are entitled On the Motion of Bodies, and the

This manuscript, entitled Philosophic Naturalis Principia Mathematics and dedicated to the society, was presented by Dr. Vincent on April 28,

But though Newton had thus discovered the true cause of all the celestial motions, he did not yet possess any evidence that such a force actually