Logier's system of and self instructor in the science of music, harmony, and practical composition This book, "Logier's system of and self instructor in the science of music, harmony, and practical composition", by Johann Bernhard Logier, is a replication of a book originally published before 1889. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.