The book ""Course of Harmony: Being a Manual of Instruction in the Principles of Thorough-Bass and Harmony"" was written by Lucien H. Southard and was published in 1855. The book serves as a comprehensive guide to understanding the fundamental principles of harmony and thorough-bass. The author provides a step-by-step approach to learning the basics of music theory, starting with the basics of notation and key signatures. He then goes on to explain the principles of harmony, including chord progressions, chord inversions, and modulation. The book is structured in a way that is easy to follow, with clear explanations and examples provided throughout. It also includes exercises and practice pieces to help readers apply the concepts they have learned.Overall, ""Course of Harmony"" is a valuable resource for anyone interested in learning the principles of music theory and harmony, whether they are beginners or more advanced students. It is a classic text that has been used by generations of musicians and continues to be relevant today.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.