BHA GROUP INC <BHAG.O> 2ND QTR MARCH 31 NET Shr 18 cts vs 15 cts Net 387,000 vs 240,000 Sales 9,346,000 vs 8,579,000 Avg shrs 2,200,000 vs 1,600,000 1st half Shr 36 cts vs 26 cts Net 734,000 vs 410,000 Sales 18.4 mln vs 17.2 mln Avg shrs 2,051,648 vs 1,600,000