The Glee Club, in its biggest weekend schedule of the year, will sing on three consecutive days with the Boston Symphony Orchestra in Symphony Hall starting this evening.

Tonight and tomorrow evening, a select group of the Glee Club and Radcliffe Choral Society will sing the choral finale of the Mahler Second Symphony under the direction of Leonard Bernstein '39. Only those who sang in last year's performance of this number will perform. Asked by Bernstein to come only a month ago, the Glee Club has practiced hard for this special occasion.

Sunday afternoon and evening, the entire Glee Club and Radcliffe Choral Society will sing Bach's B Minor Mass at Symphony Hall with the Boston Symphony Orchestra under the baton of Dr. Serge Koussevitsky. An intermission for supper will break the long program into two parts.