The Bombay Stock Exchange slipped by 15.91 points at 17,518 in the later session today, on profit booking by localoperators amid weak global cues.The Nifty of the National Stock Exchange eased by 17 points to 5,298.Erasing yestrday's gain of 50 points, the sensex was seen week following selling in Auto, Realty, Power, Capital Goods, Metal and IT stocks.