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iv now ventures into the Publick, in the ame Method that it was writ by the Author, and with the fame Incription to his Brother, tho’ dead; in confidence that this lat Piece of his will meet with as kind a Reception from the World as all the other Works of that Author have. ’Tis true there are not every where Mathematical Demontrations; but where they are wanting, you have probable and ingenious Conjectures, which is the mot that can be reaonably expected in uch matters. What belongs to, or has any thing to do with Atronomy, you will ee demontrated, and the ret ingeniouly and hrewdly gues’d at, from the Affinity and Relation of the heavenly Bodies to the Earth. For your farther Satisfaction read on, and farewel. THE