Original: Toscanini was often criticized for neglecting American music; however, on November 5, 1938, he conducted the world premieres of two orchestral works by Samuel Barber, Adagio for Strings and Essay for Orchestra.
Simplified: Toscanini was often criticized for not performing much American music and contemporary music (music by living composers). However, in 1938, he conducted the world premieres of two orchestral works by Samuel Barber, Adagio for Strings and Essay for Orchestra (Barber) Essay for Orchestra.