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14 her Works. If any one is reolved to find fault with it, let him firt be ure he undertands it. Let him firt ee in the Books of the Atronomers with how much greater Eae and Plainnes all the Motions of the Stars, and Appearances in the Heavens are explained and demontrated in this than either in that of Ptolomy or Tycho. Let him conider that Dicovery of Kepler, that the Ditances of the Planets from the Sun, as well of them Earth as the ret, are in a fix’d certain proportion to the Times they pend in their Revolutions. Which Proportion it’s ince oberved that their Satellites keep round Jupiter and Saturn. Let him examine what a contradictory Motion they are fain to invent for the Solution of the Polar Star’s changing its Ditance from the Pole. For that Star in the end of the little Bear’s Tail which now decribes o mall a Circle round the Pole, that it is not above two Degrees and twenty Minutes, was oberved about 1820 Years ago, in the Time of Hipparchus, to be above 12: and