Following is the program for the Pop Concert in Symphony Hall this evening: German Night. 1.German March,  Strube 2.  Waltz, "Donauweibchen,"  Strauss 3.  Overture, "Stradella,"  Flotow 4.  a. Nocturne,  Mendelssohn b. Wedding March, "Midsummer Night's Dream,"  Mendelssohn 5.  Introduction, "Lohengrin," Act III,  Wagner 6.  Largo,  Handel Solo Violin, Mr. Hoffmann, Organ, Mr. Marshall. 7.  The Ride of the Valkyries,  Wagner 8.  Two Hungarian Dances,  Brahms 9.  Overture, "Poet and Peasant,"  Suppe 'Cello Solo, Mr. J. Keller. 10.  Selection, "The Red Mill,"  Herbert 11.  Waltz, "The Beautiful Blue Danube,"  Strauss 12.  March, "Schlaraffen,"  Kempter