THERE is doubtless a revolution in the literary, correspondent to that of the natural world. The face of things is continually changing; and the perfect, and perpetual harmony of the universe, subsists by the mutability of its parts. In consequence of this fluctuation, different arts and sciences have flourished at different periods of the world: but the complete circle of human knowledge has I believe, never subsisted at once, in any nation or age. Where accurate and profound researches, into the principles of things have advanced to perfection; there, by a natural consequence, men have neglected the disquisition of particulars: and where sensible particulars have been the general object of pursuit, the science of universals has languished, or sunk into oblivion and contempt.