Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Practical Lesson Plans in Harmony is not a treatise on the subject of harmony. It aims to present in a direct and lucid manner an outline of the principles governing har monic composition. The student is supposed to have a thorough knowledge of the rudiments of music, as outlined in Lesson I. Until such a knowledge is acquired, progress in the study of harmony is hopeless.