<P> Grand traité d'instrumentation et d'orchestration modernes, abbreviated in English as the Treatise on Instrumentation (sometimes Treatise on Orchestration) is a technical study of Western musical instruments, written by Hector Berlioz . It was first published in 1844 after being serialised in many parts prior to this date, and had a chapter added by Berlioz on conducting in 1855 . In 1904 Richard Strauss was asked to update the text to include some modern instruments and included musical examples from Wagner, and in 1905 the updated Treatise with a new preface by Strauss was published in German . The 1905 edition was translated into English in 1948 . The book discusses the various technical aspects of instruments, such as chromatic range, tone quality, and limitations . An explanation of the role of particular instruments within the orchestra is also provided . The book also provides orchestral excerpts from classical scores to give examples of techniques discussed . These examples are sometimes of works by Berlioz himself, while Mozart, Wagner, Beethoven, and Gluck are also frequently cited . </P> <P> Many composers studied the work closely, such as Mussorgsky, Mahler, R. Strauss, and Rimsky - Korsakov . </P>

Who was the 1844 treatise on modern instrumentation and orchestration was written by