The scoring for this “music for an imaginary ballet” includes enough percussion for an eight-person team, plus timpani, with extra brass (offstage; with a second conductor), three pianos, and, I think, if not mentioned on the list I perused, an organ (try from 16:57). There seems doubt as to when the premiere was, for it may have been earlier than December 1919 when The Warriors was played by the Chicago Symphony Orchestra & Frederick Stock.