Page:Lettersconcerni01conggoog.djvu/187

162 their great Year of the World, that is, the Revolution of the whole Heavens, to conit of thirty ix thouand Years. But the Moderns are enible that this imaginary Revolution of the Heaven of the Stars, is nothing ele than the Revolution of the Poles of the Earth, which is perform'd in twenty five thouand nine hundred Years. It may be proper to oberve traniently in this Place, that Sir Iaac, by determining the Figure of the Earth, has very happily explain'd the Caue of this Revolution. this being laid down, the only Thing remaining to ettle Chronology, is, to ee thro' what Star, the Colure of the Equinoxes paes, and where it interects at this Time the Ecliptick in the Spring; and to dicover whether ome ancient Writer does not tell us in what Point the Ecliptic was interected in his Time, by the ame Colure of the Equinoxes. informs us, that Chiron, who went with the Argonauts, oberv'd the Contellations at the Time of that famous Expedition, and fix'd