sentences:  He was a conductor and pianist for the Metropolitan Opera between 1908 and 1922, and 1935-1936, coach of the opera department at the Curtis Institute from 1925 to 1930, and music director of the Chicago Civic Opera and the Ravinia Park Opera for seven years.He was a guest director of orchestras like the Chicago, Philadelphia, and Los Angeles symphony orchestras.He conducted the Philadelphia Orchestra summer concerts for four years, and from 1938-1943 he conducted at the Hollywood Bowl summer concerts.