Pared down to their environmental essence, the careful observations behind George Booruivâ€™s drawings of North American landscapes and animals are made only more apparent. In a more cluttered scene, you might not see his Grizzly bearâ€™s amputation or the bug burrowing into a sickly looking Bluebird. Tomorrow night, â€œMigratory Drift,â€ a solo exhibition of the Booruiv’s work opens at Chelseaâ€™s P.P.O.W. Gallery. The show opens from 6 to 8 PM on September 17 through October 5th at 511 West 25th Street, Room 301.