Chapter one discusses the developments between 1900-1945, concentrating on composers’ growing concern for percussion instruments and percussive sound sources. Chapter two discusses trends between 1945-1970, revealing the particular relationship between the concepts of New Music and the material of percussion. Chapter three concentrates on a detailed discussion and analysis of four percussion works, which present examples indicative not only of the diverse range of percussion scores composed in the period but also of the connection between new ideas and percussion.