"This book has grown out of lectures to students at the University of Michigan and embodies my effort to express to them the nature and meaning of art. In writing it, I have sought to maintain scientific accuracy, yet at the same time to preserve freedom of style and something of the inspiration of the subject. While intended primarily for students, the book will appeal generally, I hope, to people who are interested in the intelligent appreciation of art. My obligations are extensive, -most directly to those whom I have cited in foot-notes to the text, but also to others whose influence is...