Thesis (D.M.A.)--University of Wisconsin--Madison, 1993. Includes bibliographical references (leaves 119-125). 1. Compositional strategies of the eighteenth century: instruments and styles ; 2. Compostional strategies of the eighteenth century: the horn duo -- 3. Horn duos in the symphonies of the late eighteenth century: Haydn and Mozart -- 4. Horn duos in the chamber music of the late eighteenth century: Haydn and Mozart -- 5. Beethoven's compositional strategies: the symphonies -- 6. Beethoven's compositional strategies: chamber music with one horn -- 7. The horn duo in the chamber music of Beethoven -- 8. Beethoven's influence -- Conclusion. Photocopy. s