This book has been compiled to aid teachers and students in the development of the French Horn embouchure, particularly in the important period following elementary development. It is based upon the theory that, mechanically, nearly all of the problems to be met by the player in the orchestra, band, chamber ensemble, etc., can be covered by a comprehensive daily routine of practice. Various drills have been devised, with no claim to originality, to cope with the various mechanical problems of embouchure with which the player is faced in the field.