Ludwig Ritter von Köchel since undergone revisions. Mozart's works are often referred to by their K-numbers ("cf." opus number); for example, the "Jupiter" symphony, "Symphony No. 41" K. 551. Moreover, Köchel arranged Mozart's works into twenty-four categories, which were used by Breitkopf & Härtel when they published the first complete edition of Mozart's works from 1877 to 1910, a venture partly funded by Köchel. He also catalogued the works of Johann Fux. Ludwig Ritter von Köchel Ludwig Alois Friedrich Ritter von Köchel (; 14 January 1800 – 3 June 1877) was an Austrian musicologist, writer, composer, botanist and publisher. He is best known for
Catalogue of Works in Refutation of Methodism over 100 individual documents, books, pamphlets and articles — many of which today are regarded as historical texts. As a whole the works listed assumedly refute certain doctrines of Methodist thought, although – if somewhat ironically – many of them are by Methodist authors themselves. The book is divided into two sections, the first being a preface entitled either "Prefatory Remarks" or "Preliminary Remarks", depending upon the edition of the book (the first edition of the work was printed containing the latter title), and the second being the catalogue proper – in all editions simply deemed "Catalogue". The Catalogue section