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90 a prodigious ue the Greeks and Romans made afterwards of Mechanicks! Nevertheles, they believ'd that there were crytal Heavens; that the Stars were mall Lamps which ometimes fell into the Sea; and one of their greatest Philoophers, after long Reearches, found that the Stars were o many Flints which had been detach'd from the Earth. a Word, no one, before the Lord Bacon, was acquainted with experimental Philoophy, nor with the everal phyical Experiments which have been made ince his Time. Scarce one of them but is hinted at in his Work, and he himelf had made everal. He made a kind of pneumatic Engine, by which he gues'd the elaticity of the Air. He approach'd, on all Sides as it were, to the Dicovery of its Weight, and had very near attain'd it, but ome Time after Taricelli eiz'd upon this Truth. In a little Time experimental Philoophy began to be cultivated on a udden in mot Parts of Europe. 'Twas a hidden Treaure which the Lord Bacon had ome tion