Personnel Manager's Reports, Season 1950-51; Weekly listing of men who missed rehearsals and/or concerts due to illness, bereavement, etc.; List of extra musicians; problems with behavior of individual orchestra members; musicians missing rehearsals and concerts due to illness; letters from doctors treating ill musicians; list of orchestra personnel for the season; out-of-town concerts; Large number of extra musicians for Strauss' "Ein Heldenleben" (Mitropoulos), Schoenberg 'Variations for Orchestra" (Mitropoulos), Milhaud (The Libation Bearers); Bruckner Symphony No. 8 (Walter), Wagner Excerpts (Walter), Stravinsky "Le Sacre du Printemps" (Bernstein), Stravinsky "Petrouchka" (Mitropoulos), Wagner excerpts (De Sabata), Berg "Wozzeck" (Mitropoulos); recordings