  Newton's Principia, when it appeared in 1687, was received with the greatest
admiration, not only by the foremost mathematicians and astronomers in Europe,
but also by philosophers like Voltaire and Locke and by members of the educated
public. In this account I describe some of the controversies that it provoked,
and the impact it had during the next century on the development of celestial
mechanics, and the theory of gravitation.
