Sargent and Impressionism (Adelson Galleries, 19 E. 82, closes Saturday). Two dozen-plus paintings and watercolors in which John Singer Sargent, who befriended Monet and looked closely at his work, dabbled in the then-revolutionary language of French impressionism, almost always to striking (if not quite idiomatic) effect. Guaranteed to open the eyes of those who think of Sargent purely as as a high-society portraitist (TT).