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his ſolicitations that its becoming publick is owing. For when he had obtained of me my demonſtrations of the figure of the celeſtial orbits, he continually preſſed me to communicate the ſame to the Royal Society; who afterwards, by their kind encouragement and entreaties, engaged me to think of publiſhing them. But after I had begun to conſider the inequalities of the lunar motions, and had entered upon ſome other things relating to the laws and meaſures of gravity, and other forces; and the figures that would be deſcribed by bodies attracted according to given laws; and the motion of ſeveral bodies moving among themſelves; the motion of bodies in reſiſting mediums; the forces, denſities, and motions of mediums; the orbits of the Comets, and ſuch like; I put off that publication till I had made a ſearch into those matters, and could put out the whole together. What relates to the Lunar motions (being imperfect) I have put all together in the corollaries of prop. 66. to avoid being obliged to propoſe and diſtinctly demonſtrate the ſeveral things there contained in a method more prolix than the ſubject deserved, and interrupt the ſeries of the ſeveral propositions. Some things,
