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136 always the Fore-runners of ome great Calamity which was to befall Mankind. Sir Iaac Newton, on the contrary, upected that they are very beneficent; and that Vapours exhale from them merely to nourih and vivify the Planets, which imbibe in their Coure the everal Particles the Sun has detach'd from the Comets; an Opinion which at leat is more probable than the former. But this is not all. If this Power of Gravitation or Attraction acts on all the celetial Globes, it acts undoubtedly on the everal Parts of thee Globes. For in cae Bodies attrat one another in Proportion to the Quantity of Matter contain'd in them, it can only be in Proportion to the Quantity of their Parts; and if this Power is found in the whole, 'tis undoubtedly in the half, in the quarter, in the eighth Part, and o on in infinitum. is Attraction, the great Spring by which all Nature is mov'd. Sir Iaac Newton after having demontrated the Exitence of this Principle, plainly foreaw