Compositions   1926: Piano Concerto 1936: El Salón México 1938: Billy The Kid 1940: Quiet City 1942: Danzón Cubano 1942: Rodeo 1944: Appalachian Spring 1954: The Tender Land 1959: Dance Panels 1973: Threnody 1 & 2	Science 1919: Rutherford: Splits the Atom 1930: Carrother/Du Pont: Nylon             1953: Crick & Watson: Helical DNA   1969: Armstrong: Walks on Moon