ontexts. The latest concert in Avery Fisher Hall was typical: Robert Fuchs's Symphony No. 3, Alexander Zemlinsky's Symplzonische Gesiinge, Mahler's Ruckert Lieder; and Franz Schreker's "Nachtstiick" interlude from his opera Der Ferne Kiang -- rare works, the Mahler songs excepted, that few audiences can have e